Recent Version History

• Local file manager mode (two local panels). 1893
• Ongoing delete operation can be moved to background queue. 194
• Showing directory size in file panel. 41
• Tab titles are shortened to fit window width as needed. 1423
• Tabs show tooltips with full session name and paths.
• Remembering remote directory tree nodes state when switching sessions. 1057
• Shift-clicking New Session command opens the Login dialog in new WinSCP instance, instead of possibly opening new instance of workspace.
• When switching tabs, prevent visibly scrolling the panels when focusing the last selected file.
• Removed the “compression” indicator from the status bar.
• Allowed normal behavior of double-click on a file even when resolving of symlinks is disabled. 2037
• Session.ExecutablePath returns detected or actual executable path when not set. 2055
• Change: Keyboard shortcut for Command Line command changed to Shift+Ctrl+M (Shift+Ctrl+N previously).

• Translation updated: German.
• SSH core upgraded to pre-release build of PuTTY 0.77.
  It brings the following changes:
  • Support for HTTP Digest authentication for proxies.
  • PuTTYgen: RSA key generation with side-channel safety (probabilistic only).
• WebDAV core upgraded to neon 0.32.2.
• XML parser upgraded to Expat 2.4.6.
• Allowed uploading edited files over encrypted session. 1989
• Building .NET assembly in Visual Studio 2019.
• Bug fix: Failure when attempting to switch to an unconnected sessions using keyboard shortcuts while another session is being connected.
• Bug fix: Removing all custom commands resets the default ones when INI file is used. 2059
• Bug fix: Failure when changing remote folder using directory tree while previous directory is still loading. 2060
• Bug fix: Drive that was ever opened in local file panel cannot be safely removed until WinSCP is closed. 2061

• File masks relative to the root of an operation. 2052
• Private key can be provided as string in .NET assembly and scripting. 2044
• Support for importing key files that are specified using home ~ prefix from OpenSSH config file. 2053
• Translation updated: German.
• TLS/SSL core upgraded to OpenSSL 1.1.1m.
• Commands that do not fit on Custom Commands toolbar are presented in drop down menu, instead of a horizontal bar. 554
• First hiding right-most Custom Commands toolbar commands that do not fit.
• Prevent hang when dragging files without drag&drop shell extensions when some mapped network drive is not available. 2054
• Added new ap-southeast-3 AWS region.
• XML parser upgraded to Expat 2.4.2.
• Bug fix: When initial remote directory specified in the open command does not exist, the error was silently ignored.
• Bug fix: File color rules with path mask do not work for local files.

• Support for ACL for S3 protocol. 1641
• SSH core upgraded to PuTTY 0.76. 1984
  It brings the following changes:
  • Support Curve448 key exchange method. curve448
  • Support Ed448 user and host keys. ed448
  • Support rsa-sha2-256 and rsa-sha2-512 SSH public key algorithms. 1952 rsa-sha2
  • Change: SHA-256 fingerprints are not padded anymore.
• It is possible to import sessions from OpenSSH config file. 1896
• Change: Removed support for SSH-1.
• Optionally keeping symbolic link name in path instead of resolving it with SFTP protocol. 81
• Improved shortening long paths, when single level name is too long on its own. 2043
• WebDAV core upgraded to neon 0.32.1.
• Allow displaying all VMS file revisions with FTP protocol. 1944
• Support reading S3 credentials from AWS CLI configuration. 1941
• Bytes transferred are recorded in XML log and available in .NET assembly API. 597
• Generating PPK3 keys.
• It is possible to copy information to the clipboard from the Properties dialog.
• Made WinSCP.exe be deployed even when WinSCP NuGet package is included as transitive dependency. 2017
• When performing a single-item atomic operation, displaying indeterminate progress status.
• S3 Security token session option renamed to a more appropriate Session Token.
• Not resetting protocol to WebDAV when S3 protocol is selected and HTTP URL is pasted on the Login dialog. 2045
• Automatically reconnect when FTP server fails to open data connection, if it previously worked. 2046
• Confirm closing when multiple tabs are opened and auto workspace saving is not enabled, even when none of the tabs contain an active remote session.
• Including host key of tunnel session in generated code. 2006
• Support for custom certificate store files with configurable path. 2034
• Allowed providing tunnel private key passphrase in scripting. 2029
• Improved handling of long shell command error messages. 1949
• Considering global passive/active mode settings when importing sessions from FileZilla
• Automatically retry when S3 transfer fails with 503 code (Slow down or Service unavailable). 2047
• Improving formatting of errors displayed after an operation completed in Continue on error mode.
• Shift+Ctrl+R keyboard shortcut for Reconnect Session command.
• Change: Keyboard shortcut for Restore Selection command changed to Shift+Ctrl+S (Shift+Ctrl+R previously).
• Change: Monitoring A: and B: drives. 2014
• Preventing beep when using Alt+Enter to open the Properties dialog.
• When collecting list of files for background transfer, say “Listing” instead of “Calculating” not to give an impression that it is a superfluous operation. 2026
• Checking for too many parameters with /keygen switch.
• PNG code upgraded to PngComponents 1.7.0.
• Warning when selecting too new key file.
• Warning when opening more than 100 tabs. 1997
• Including HTTP message into S3 error message.
• Bug fix: Do not say “Terminated by user” when the session has actually timed out.
• Bug fix: Cannot use passwords and passphrases longer than 255 characters in automation and various other purposes. 1988
• Bug fix: When size of a file downloaded with FTP protocol changes (or when ASCII mode is used) the logged size did not reflect the actual transfer size.
• Bug fix: When connecting disconnected session the directory might be loaded twice.
• Bug fix: Failure when entering directory that contains file with a slash in its name. 2016
• Bug fix: When S3 authentication region changes during session, previously visited buckets from the original authentication region could not be accessed anymore. 2027
• Bug fix: Failure when using multiple connections with local proxy command. 2028
• Bug fix: Configuration import did not remove old sites and did not load all GUI settings. 2040
• Bug fix: When S3 transfer fatally fails, error details were lost.

• Translation updated: German.
• Back-propagated fixes from 5.20–5.20.2 releases:
  • TLS/SSL core upgraded to OpenSSL 1.1.1m.
  • XML parser upgraded to Expat 2.4.6.

• Compatibility with Google Cloud S3 API when duplicating files. 2038
• Compatibility with Google Cloud S3 API when deleting implicitly existing directories. 2042
• Translation updated: Turkish.
• Logging a reference to 1952 when an OpenSSH 8.8 (or newer) server refuses the key.
• Bug fix: Crash when new contents is copied to the clipboard while downloading files pasted from the clipboard. 2036
• Bug fix: Browse Remote Directory command on Synchronization checklist did not locate file with spaces.
• Bug fix: Extension ZIP and Upload does not work with files in a drive root. 2039
• Bug fix: Path on Console window was not shortened when it did not fit.

• Translation updated: Hungarian.
• Showing release date on the About dialog.
• Support for custom certificate store files. 2034
• Allow other 2xx responses to PWD command, not only the standard 257. 1768
• Bug fix: When there are both site folder and site with the same name and the site was selected when closing the Login dialog, when reopening, the folder was selected instead.

• Translation updated: French.
• TLS/SSL core upgraded to OpenSSL 1.1.1l.
• Using Documents folder when the last used local directory in Explorer interface does not exist anymore. 2011
• Bug fix: TLS session resumption is not working for subsequent FTP transfers with TLS 1.3 when the server requires reuse of the session of the previous transfer. 2018
• Bug fix: Cannot access S3 bucket root when the access policy checks for empty prefix. 2021
• Bug fix: Response from ProFTPD FTP checksum commands is not recognized. 2023
• Bug fix: Failure when submitting prompt with “Never ask me again” selected. 2022
• Bug fix: Panels are drawn incorrectly after toggling Full row select. 2025
• Bug fix: Timeout while uploading files to some FTP servers using TLS 1.3. 2030
• Bug fix: Incomplete listing for S3 servers that indicate truncated listing after the contents and whose pagination is a multiple of 8 (e.g. Backblaze). 2032

• Translation completed: French.
• Restored compatibility with FTP servers that return malformed cdir and pdir entries in directory listing. 2004
• Fix from PuTTY 0.76: Avoid crash in MIT Kerberos for Windows on session restart.
• SSH private key tools (PuTTYgen and Pageant) upgraded to PuTTY 0.76. It brings the following change: After 30 or so simultaneous sessions, Pageant stops working. win-pageant-max-connections
• Bug fix: Empty local drive could not be entered. 2000
• Bug fix: TLS settings in default site settings is not restored when opening Login dialog in some cases. 2001
• Bug fix: Memory leak when deleting completed background transfers.
• Bug fix: Hang when running under Task Scheduler or a similar service with session logging enabled. 2005

• Translation updated: Italian.
• Incrementing port numbers for secondary connections of tunneled sessions with fixed forwarding port number. 1996
• Bug fix: Failure when automatically opening a workspace on startup with too many sessions. 1997
• Bug fix: Failure when reading a key file without a trailing newline. 1998
• Bug fix: Failure when SFTP server resolves . path to an empty string. 1999

• When installing an extension from a URL, not saving the extension with BOM.
• Not aborting “Keep remote directory up to date” function when connection is lost while deleting files or looking for differences and the session is reconnected. 1994
• Bug fix: When handling URL in an existing WinSCP instance, session settings from a stored site named after the URL hostname are not used. 1992
• Bug fix: It was possible to move toolbar on progress windows.
• Bug fix: When installing an extension from a file, it is always saved in UTF-8 with BOM, disregarding the original encoding. 1993
• Bug fix: When “Keep remote directory up to date” function was started from command-line, disconnects were not detected.
• Bug fix: When connection was lost and not reconnected, the “Keep remote directory up to date” window was not closed.

• XML parser upgraded to Expat 2.4.1.
• Installer upgraded to Inno Setup 6.2.0.
• Using multipart uploads with S3 protocol on Google Cloud as it is supported there now.
• Bug fix: Broken layout of Properties dialog when opening on a secondary display with high DPI primary display. 1990
• Bug fix: The “Drag & drop shell extension” installation component was not showing its size.
• Bug fix: When saving a local file, the “Saving” status on the Internal editor status bar is never cleared.
• Bug fix: No error message is sometimes shown when SFTP server disconnects. 1991

• Translation updated: Farsi.
• Support for PPK version 3 keys from PuTTY 0.75. 1986 ppk3
• SSH private key tools (PuTTYgen and Pageant) upgraded to PuTTY 0.75. It brings the following changes:
  • Pageant now supports loading a key still encrypted, and decrypting it later by prompting for the passphrase on first use. pageant-deferred-decrypt
  • Upgraded default SSH key fingerprint format to OpenSSH-style SHA-256.ssh-fingerprint-formats
  • PuTTYgen now supports alternative provable-prime generation algorithm for RSA and DSA.
  • Replaces Windows Pageant’s IPC with named pipes. pageant-named-pipe
  • Bug fix: PuTTYgen mis-writes OpenSSH private key format for some Ed25519 keys. openssh-ed25519-corrupt-private-key
• Bug fix: Moving a transfer to background just in between two individual file transfers cancels the transfer. 1983
• Bug fix: Files saved in external editors are not uploaded in timezones behind UTC. 1985
• Bug fix: Sort > By Type icon for was still incorrect.

• TLS/SSL core upgraded to OpenSSL 1.1.1k.
• XML parser upgraded to Expat 2.3.0.
• The enumerable returned by Session.EnumerateRemoteFiles implements the interface implicitly to allow access to the interface method (GetEnumerator) from late-bound languages, like PowerShell.
• Disabling multipart uploads with S3 protocol on Google Cloud they are not supported there. 1972
• Allow downloading a file from an FTP server via a symbolic link in scripting or when handling a URL. 1973
• Allowing use of the stream returned by Session.GetFile from a different thread. 1978
• Workaround for specific encoding of special characters in filenames by OneDrive WebDAV interface. 1824
• https:// URL with known S3 API hostname (s3.amazonaws.com, digitaloceanspaces.com, storage.googleapis.com) is interpreted as S3 protocol, instead of WebDAV.
• Automatically resume transfer when TLS re-key fails. 1982
• Translation updated: German.
• Bug fix: Ignoring disconnect messages from the server while closing the connection. 1977
• Bug fix: Preventing another application (or WinSCP instance) stealing the selected tunnel port. 1971
• Bug fix: Hang after receiving multiline response from FTP server. 1963
• Bug fix: Sort > By Type icon for was incorrect.
• Bug fix: Keyboard cues were shown in toolbar buttons drop down menus even when the menu was dropped down with mouse.
• Bug fix: Failure when connecting to FTPS server that supports client certificates with translation that uses multi byte encoding. 1966
• Bug fix: Remembered password is forgotten after the first failed (re)connect, even if the failure did not involve the password. 1967
• Bug fix: Problems with port forwarding are not detected. 1970
• Bug fix: Potential failure when waiting for a command executed from Console window is aborted.
• Bug fix: When saving a site with a slash in the username, it is misinterpreted as a site folder.
• Bug fix: DST start or end causes edited/opened files to be uploaded. 1974
• Bug fix: Failure when retrieving a directory listing from an FTP server when the data are transmitted in huge amount of tiny chunks. 1976
• Bug fix: Some operations with relative paths (notably creating and deleting a subdirectory) were failing on encrypted session.
• Bug fix: Local > Go to > Explore Directory was not working with focused remote panel.
• Bug fix: A workspace session opened from a stored site could not be used for operation in a new window or duplicated.
• Bug fix: Error when uploading an empty folder in the foreground or any folder in the background to an FTP server with permissions configured.
• Bug fix: Adding new background transfer while queue processing is disabled and some parallelized transfer was already started results in “waiting” items being endlessly added to the queue list.

• Translations completed: Korean and Romanian.
• TLS/SSL core upgraded to OpenSSL 1.1.1j.
• When opening or switching to a session whose local directory does not exist, open the nearest existing parent directory. 1951
• Switch-like raw session settings can be configured using on/off/auto keywords.
• Improving validation of port numbers in scripting and .NET assembly.
• Bug fix: Parsing of multiline VMS FTP listing entries is broken. 1950
• Bug fix: When moving files to an unvisited folder in an encrypted session, the folder contents is cached as before the move.
• Bug fix: Failure when dropping files to a disconnected tab or duplicating to a disconnected session.
• Bug fix: Failure when duplicating a not-yet-connected session.
• Bug fix: Canceled or failed FTP transfer caused connection loss.
• Bug fix: Some errors and information while opening a session in scripting were not logged. 1956
• Bug fix: SFTP uploads are slow. 1957
• Bug fix: Failure when S3 bucket contains a subfolder with an empty name. 1958
• Bug fix: Cannot enter an S3 folder that only contains a subfolder with an empty name. 1959
• Bug fix: Error when moving or copying file with non-ASCII file name using S3 protocol. 1960
• Bug fix: Timezone is not correctly reflected in S3 timestamps.

• Compatibility with Google Cloud Storage when using S3 protocol to access the buckets. 1939
• Bug fix: Failure when closing with no tab. 1947
• Bug fix: Debug information is printed at the end of the scripting session when debug logging level is set even if logging is turned off. 1948

• Improved FTP support for VMS servers (and potentially for other non-Unix-like systems). 49
• Translations completed: Brazilian Portuguese, Catalan, Czech, Dutch, Finnish, German, Hungarian, Italian, Japanese, Norwegian, Polish, Portuguese, Russian, Simplified Chinese, Slovak, Spanish, Swedish, Traditional Chinese, Ukrainian and Turkish.
• TLS/SSL core upgraded to OpenSSL 1.1.1i.
• Preserve file permissions when overwritten files are recycled and transfer resume is disabled. 1929
• Keyboard-interactive authentication challenges can be copied to the clipboard and links contained in the challenges can be opened. 1930
• Added method RemotePath.EscapeOperationMask to .NET assembly.
• Added method ComparisonDifference.Reverse to .NET assembly.
• Implemented method ComparisonDifference.ToString in .NET assembly.
• Write, CanWrite, Length and Position methods and properties of the Stream returned by the Session.GetFile behave as expected for a read-only steam.
• Allowed using SFTP servers that have problems with SSH_FXP_REALPATH requests. 1933
• Bug fix: Target file name with escaped operation mask special symbols was incorrectly interpreted as an actual operation mask on some dialogs (upload, duplicate, etc), resulting in misplaced warnings
• Bug fix: Local path argument of Session.PutFileToDirectory is incorrectly escaped. 1931
• Bug fix: Path argument of Session.PutFile is incorrectly escaped.
• Bug fix: Failure when using from single-file bundle. 1932
• Bug fix: Session.GetFile can fail, if the server responds too quickly.
• Bug fix: Failure when S3 bucket contains a folder with an empty name. 1934
• Bug fix: When the active tab was disconnected, closing window with another active session did not require a confirmation.
• Bug fix: Setting the logging level to -1 (Reduced) does not work in .NET assembly. 1936
• Bug fix: Ellipses from German command names are not stripped from toolbar buttons.
• Bug fix: Hang when the stream returned by Session.GetFile is closed before the download finished.
• Bug fix: Failure when looking for PuTTY key tools and the PATH contain invalid paths. 1942
• Bug fix: Prevent loading session settings that can lead to remote code execution from handled URLs. 1943
• Bug fix: Hang when S3 server returns a truncated listing with folders only. 1946

• A complete list of files that are part of a background transfer can be shown. 1785
• Stream interface in .NET assembly. 1738
• With SFTP protocol files can be streamed to stdout and from stdin in scripting.
• Support SHA-256 fingerprints of TLS/SSL certificates. 1842
• Extension Synchronize with another remote server.
• When connecting to new SSH host, its host key can be automatically accepted in scripting and .NET assembly.
• Optional case-sensitive synchronization. 71
• Enabled TLS 1.3 by default.
• XML parser upgraded to Expat 2.2.10.
• SSH core upgraded to PuTTY 0.74. It brings the following change:
  • Security fix: If an SSH server accepted an offer of a public key and then rejected the signature, WinSCP could access freed memory, if the key had come from an SSH agent. vuln-agent-keylist-used-after-free
• Resume transfer when FTP data connection disconnects. 1878
• Support for curve25519-sha256 KEX. 1865
• Support for authentication using temporary credentials from AWS Security Token Service (STS). 1839
• Support for SNI with FTP. 1895
• Installer upgraded to Inno Setup 6.1.2.
  • Change: Installer needs Windows 7 SP1/2008 R2 SP1.
• Alternative way to provide credentials in scripting/command-line without URL-encoding. 1821
• Compatibility with WebDAV servers that incorrectly encode file URL. 1876
• Optimizing S3 connection buffers for speed. 1732
• Edited/opened files from a disconnected session can now be attached to new session even if its username was entered only during authentication instead of directly on the Login dialog. 1890
• Returning to Login dialog, when ad-hoc connection fails. 1909
• Local ports for active FTP mode can be limited. 958
• Allow explicit navigation to a hidden local folder by enabling showing of hidden files and folder, if not enabled yet. 1905
• Added full Go To submenu to context menu of panel path label
• Automatically restore external editor defaults when changing editor command from Notepad to 3rd party editor. 1872
• Suppress errors when opened/edited files are locked. 1832
• Support clearing GID/UID flag on directories with new versions of GNU coreutils. 1850
• Added /nointeractiveinput to usage screen.
• List encrypt-then-MAC algorithms in /info listing. 1917
• Not using a transfer via temporary file for files that would exceed system length limit with the temporary extension. 1922
• Automatically closing timed out Session. 1923
• Logging IANA encryption algorithm names. 1886
• Displaying, what directory is being read at the end of login to a server, in a tooltip. 1916
• Use dark window title for the main window in the dark mode on Windows 10 2004. 1920
• Clarified that WinSCP may crash in the warning message when trying to load too big file into the internal editor. 1847
• Do not prevent WinSCP from working when jump list cannot be updated. 1857
• Allow forcing use of LIST command to retrieve file information in scripting for FTP servers that has broken support for MDTM/SIZE commands. 1921
• Duplicate and Rename commands work even for disconnected sessions.
• IPv6 literals with scope or literals that are already escaped in square brackets are formatted standardly in session URL (instead of URL-encoding them).
• Allowed longer input on Edit file input box. 1911
• Added help link to Add extension box and making the box wider.
• GSSAPI key exchange authentication can be turned on. 1863
• When trying to open an inaccessible local directory, display an error message, instead of silently doing nothing.
• Cleanup application data dialog labels cache cleanup checkbox label updated to reflect previously updated functionality.
• Disabling tips controls until some tips are actually available.
• Optionally disable moving using drag&drop. 1884
• Main window follows Login dialog to another monitor, when switched using keyboard shortcuts Shift+Win+Left/Right. 1907
• When path to an existing local directory is specified on the Download options dialog without an operation mask, a noop operation mask is implied.
• Workaround for wrong description of Num * keyboard shortcut in menus with German keyboard. 1889
• Files with the same name except for a letter case are sorted deterministically. 1894
• Not offering pasting from clipboard on the file panels if the clipboard contains multi-line text.
• Extending transfer dialog drop down menu size to 16 entries.
• Bug fix: Local file panel ignored changes in latter case of files and folders. 1885
• Bug fix: Local custom commands that need session but no remote files were not disabled when session was not connected.
• Bug fix: Correct letter case variant of remote directory in directory tree was not always selected. 1891
• Bug fix: With no connected session, shared bookmarks modifications are not preserved.
• Bug fix: Using list header color appropriate for the actual light/dark column background color (list headers are not dark, unless system wide app dark mode is enabled).
• Bug fix: Session.ParseUrl cannot accept fingerprint parameter for sessions over TLS. 1925
• Bug fix: Custom command patterns !S/!E do not include fingerprint of TLS certificate.
• Bug fix: Cannot work with filenames ending with space with FTP protocol. 1900
• Bug fix: Canceling remote path drop down did not reset it back to the current path.
• Bug fix: Folders in a drive root showed incorrect type name sometimes.
• Bug fix: Customizing custom commands from Synchronization checklist window was not working. 1908
• Bug fix: Whole local drive could have been scanned when trying to browse to non-existing or hidden folders.
• Bug fix: Timed out status bar note was not added to history popup box, while a session is disconnected.
• Bug fix: Duplicate command in remote file context menu operated over selected files instead of the focused file.
• Bug fix: *nix shell special characters were unintentionally escaped in PuTTY/SSH terminal command patterns. 1906

• Back-propagated security fixes from 5.18.1 release:
  • TLS/SSL core upgraded to OpenSSL 1.1.1i.
  • Bug fix: Prevent loading session settings that can lead to remote code execution from handled URLs. 1943

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