Recent Version History

• 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

• Translation updated: German.
• Bug fix: Failure when using S3/AWS access ID or region longer than 32 characters. 1914
• Bug fix: Failure when opening some menus while having long text of specific length copied to the Clipboard. 1915
• Bug fix: Failure when directory contains a file with too long name. 1924

• TLS/SSL core upgraded to OpenSSL 1.1.1h.
• Allow using Windows Store apps aliases as terminals (particularly Windows Terminal). 1901
• Limiting error report and message search URLs to 4 KB, as larger URLs fail to open in some browsers.
• SSH private key tools (PuTTYgen and Pageant) upgraded to PuTTY 0.74.
• Bug fix: Session.CompareDirectories handles incorrectly files with names containing reserved XML characters. 1897
• Bug fix: Keep local directory up to date extension fails if error occurs before session URL is parsed.
• Bug fix: SFTP uploads started over already disconnected session do not reconnect automatically. 1913

• WebDAV core upgraded to neon 0.31.2.
• Security fix from PuTTY 0.74: 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
• Displaying progress of synchronization in Keep local directory up to date extension. 1887
• Displaying session name and operation status in console title of Keep local directory up to date extension. 1888
• Translation updated: German.
• Removed workaround for lack of support for max-keys parameter in Backblaze S3 API, as it is supported now. 1871
• Bug fix: Failure while changing path using path label while another command was executing already. 1877
• Bug fix: Failure when system settings change during synchronization. 1879
• Bug fix: Failure when trying to close WinSCP while reading a remote directory. 1880
• Bug fix: Failure after using files from a disconnected session (for example saving an edited file). 1881
• Bug fix: Directory reading cannot be cancelled for SFTP servers that provide optional end-of-list field. 1883
• Bug fix: Going to root folder in the local panel does not update selection in the directory tree.

• Added new af-south-1 and eu-south-1 AWS regions. 1864
• Translation updated: Brazilian Portuguese.
• Not defaulting to Documents folder on a network drive even if it is mapped. 1869
• Workaround for lack of support for max-keys parameter in Backblaze S3 API. 1871
• Installer upgraded to Inno Setup 6.0.5.
  • Change: Installer does not support Windows Vista/2008 anymore.
• Bug fix: Transfer settings are not preserved when starting synchronization in new window.
• Bug fix: Keep remote directory up to date window cannot be restored after it was minimized to tray using Minimize to System Tray command, when the window was opened from command-line or using Start in New Window command. 1868
• Bug fix: Starting synchronization in a new window should be disabled when Selected files only option is selected, as that combination is not implemented. 1870
• Bug fix: Starting a synchronization in a new window does not work if the remote path consist of one level only.
• Bug fix: Failure when canceling an authentication of an ad-hoc session from a workspace opened from command-line. 1875
• Bug fix: GSSAPI key exchange authentication is off by default as it caused failures when old version of MIT Kerberos was installed on the machine. 1874

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