Recent Version History

• Optimized working with large local directories: 2264
  • Loading large directory trees on the background.
  • Hidden directory trees are loaded only in the background.
  • Optimizing directory loading by checking existence of subfolders on the background.
  • Optimized reading directories for file panel.
  • Optimized browsing within directory tree with lots of subfolders.
• Improvements to AWS/S3 authentication and configuration handling:
  • Allowed assuming IAM role. 2249
  • Credential profiles in .aws/config file are also recognized.
  • Preferring configuration file defined using an environment variable over the default one.
  • Only profiles that contain both aws_access_key_id and aws_secret_access_key are listed on the Login dialog
  • Bug fix: The .aws/credentials file path was resolved using AWS_CONFIG_FILE environment variable instead of correct AWS_SHARED_CREDENTIALS_FILE.
• Fallback to nonresumable transfer when temporary target file cannot be created. 2277
• Logging can be enabled for installer subtasks.
• Limited SFTP upload queue length to avoid networking congestion.
• Bug fix: Possibility that files in root folder were incorrectly used.
• Bug fix: Failure when system theme is changed at the same time directory change is detected. 2286

• Translation updated: Danish.

• SSH core and SSH private key tools (PuTTYgen and Pageant) upgraded to PuTTY 0.81.
  It brings the following change:
  • Security fix for CVE-2024-31497: NIST P521/ecdsa-sha2-nistp521 signatures are no longer generated with biased values of k. The previous bias compromises private keys. 2285 vuln-p521-bias
• Translation updated: Belarusian.
• XML parser upgraded to Expat 2.6.2.
• Support for TortoiseMerge in Compare Files extension. 2279
• Bug fix: File panel does not have focus after Login in Explorer interface. 2276
• Bug fix: Failure when closing the last remote tab. 2283
• Bug fix: Copy and paste to another application in Store installation sometimes does not work. 2284

• Translation updated: Belarusian.
• XML parser upgraded to Expat 2.6.1.
• Optimized startup when right panel local directory tree is not visible.
• Workaround for SFTP servers (Cisco) which omit message field from status response. 2272
• Bug fix: Password pipe cannot be used to open a session in an existing instance. 2265
• Bug fix: Hang when canceling connection while reading remote directory. 2266
• Bug fix: Failure when canceling FTP connection while reading remote directory. 2267
• Bug fix: Cannot start on Windows XP. 2268
• Bug fix: Installation hangs when adding installation path to search path when executed in session 0. 2270
• Bug fix: Misplaced stored site use warning in scripting when session name is specified. 2271
• Bug fix: Correcting neon version in About box and logs.

• Translation completed: Norwegian.
• Bug fix: Badly encoded SFTP packet when renaming a file using SFTP version 5 and newer. 2259
• Bug fix: Failure when trying to synchronize files by checksum on server that does not support it. 2260
• Bug fix: Random hang/failure when closing FTP TLS 1.3 connection. 2261
• Bug fix: Cannot use IPv6 literal as hostname on Login dialog. 2263

• XML parser upgraded to Expat 2.6.0.
• Bug fix: Hang when prompt pops up while SFTP session is being reconnected. 2258

• Translations completed: Farsi, French, Japanese, Spanish and Traditional Chinese.
• TLS/SSL core upgraded to OpenSSL 3.2.1.
• WebDAV/HTTP core upgraded to neon 0.33.0.
• Bug fix: Failure when trying to upload file using double-click over disconnected session. 2254
• Bug fix: Failure after long frequent use of session tabs. 2255
• Bug fix: New tab icon is drawn incorrectly on Explorer interface with Show selective text labels turned off. 2257
• Bug fix: Failure when switching to another application while new session is being opened using New Tab tab. 2251

• Added new ca-west-1 AWS region.
• Translations completed: Catalan, Czech, Dutch, Finnish, German, Hungarian, Italian, Korean, Polish, Portuguese, Romanian, Russian, Simplified Chinese, Slovak, Turkish and Tamil; and updated: Japanese.
• Support for posix-rename@openssh.com SFTP extension. 2231
• When cleaning up application data, deleting even Martin Prikryl and WinSCP 2 root keys, if they remain empty.
• Ignoring attempts to directly move/duplicate file over itself, as if protocol requires deleting, the file would be lost.
• Configurable FTP TLS shutdown procedure. 2250
• Not failing connection when FTP server responds to CSID command with an error. 2253
• Bug fix: Certificate authority cache was not copied to new configuration storage nor cleaned up with other caches.
• Bug fix: ssh protocol URL handling was not completely unregistered.
• Bug fix: Reported transfer size is rarely incorrect during FTP downloads.
• Bug fix: Failure after connecting to server. 2251
• Bug fix: FTP CSID command does not end with semicolon. 2252

• SSH core and SSH private key tools (PuTTYgen and Pageant) upgraded to PuTTY 0.80.
  It brings the following change:
  • Mitigations for SSH protocol “Terrapin” vulnerability. 2246 vuln-terrapin
• Support for Include directive when importing sites from OpenSSH. 2239
• Change: .NET assembly collections are tagged with ClassInterfaceType.None to avoid warnings from regasm.
• Not using directory listing to keep FTP session alive by default. 2244
• Windows Store installation on Windows 11 was incorrectly using INI file for configuration storage by default. 2245
• Bug fix: Find dialog file list is scaled incorrectly on some multi monitor systems with different scaling. 2241
• Bug fix: Cannot browse long local paths. 2242

• File hash can be used as criterion for synchronization. 52
• Consistent behavior across protocols and protocol capabilities when duplicating remote files. 2233
• Columns > Reset Layout command added to Explorer interface too.
• TLS/SSL core upgraded to OpenSSL 3.2.0.
• Support for “Requester pays” S3 buckets. 2213
• Optional more prominent active session tab. 2229
• Optionally not shortening tab titles. 2202
• New winscp.net root certificate.
• Restored support for legacy version of the Digest algorithm specified in RFC 2069. 2109
• Restored consistent behavior of failing, between duplicating and moving/renaming files over existing file with WebDAV protocol in scripting and .NET assembly.
• When moving a folder by drag&drop to a path that already contains a subfolder with the same name, the existing folder is overwritten.
• Shorter and more friendly formatting of long time intervals. 2236
• When typing ambiguous port numbers in Login dialog, keeping the current protocol, even if it is not the default protocol for the port.
• Bug fix: Failure when New Tab is clicked while another session is still being loaded.
• Bug fix: Corrected some painting artifacts on session tabs, particularly on Windows 11.
• Bug fix: Shift+F5 shortcut operated with a focused file, rather than with selected files.
• Bug fix: OpenSSL version in About dialog was not up to date.
• Bug fix: Cannot leave directory entered via cache with SCP protocol if it was deleted meanwhile. 2234
• Bug fix: Failure when connection is lost while reading remote directory with SFTP protocol. 2235
• Bug fix: Multipart upload to Cloudflare R2 S3 interface fails due to too long upload ID. 2237
• Bug fix: Panel focus was lost in some situations.
• Bug fix: When S3 or WebDAV server did not provide file timestamp, downloaded file was set to oldest possible timestamp.
• Bug fix: When session URL is typed into Host name box or pasted using context menu of the box and the Login dialog is submitted using Enter key, the URL is not parsed correctly.
• Bug fix: Failure when saving edited file over reconnected session after previous reconnect attempt was aborted. 2238

• Single large file can be downloaded using multiple SFTP connections. 513
• Support for OpenSSH certificates for host verification. Sponsored by Teleport. 2145
• SSH core and SSH private key tools (PuTTYgen and Pageant) upgraded to PuTTY 0.79.
  It brings the following change:
  • Support for HMAC-SHA-512. hmac-sha2-512
• TLS/SSL core upgraded to OpenSSL 3.1.3.
• Allowed S3 connection with IAM role instead of credentials. 2089
• Command to open the same folder as in the other panel in local file manager mode. 2189
• Support appending when streaming file contents to remote server. 2214
• Commands to reset layout of file panels and background transfer queue list columns.
• Change: SSL (3.0) is no longer supported. TLS 1.0 and 1.1 are disabled by default, to match the OpenSSL 3 defaults.
• Using optimized OpenSSL implementations of some algorithms.
• Command to automatically size file panel columns. 2196
• Allowed browsing a source folder/file instead of downloading when handling a download URL. 2211
• Passing password to PuTTY using named pipe instead of commandline.
• Made it harder to mis-click “never show this again” checkboxes. 2217
• winscp.net root certificate is always trusted when checking for updates, even when (corporate managed) Windows certificate store does not trust it. 2212
• Not browsing a source folder when handling a download URL when a download dialog is canceled.
• Recognizing CertificateFile directive when importing sites from OpenSSH. 2220
• Restored ability to duplicate remote folders using cp command in secondary shell session even when the SFTP server supports copy-file/copy-data extension. 2227
• https:// URL with r2.cloudflarestorage.com hostname is interpreted as S3 protocol, instead of WebDAV.
• Recognizing path in Host name box on Login dialog. 2219
• Improved behavior when moving/renaming over an existing folder. 2209
• Improved OpenSSH config file parsing, particularly quoted and escaped values. 2206
• Support for ProFTPD command OPTS REST STOR to query if upload restart is possible. 2194
• Not showing a filter mask on a disconnected panel.
• Implemented generic ICollection implicitly by .NET assembly collections. 2187
• ProxyMethod raw session setting supports symbolical value names.
• Ignoring disconnects from the server while closing the connection. 2195
• Translations updated: Danish and Traditional Chinese.
• Preventing background transfer queue list columns width to shrink too much. 2208
• Not forcing text mode for edits with Windows Notepad on Windows 10 1809 and newer, as it already supports non-Windows line endings.
• Allowed disabling SFTP extension use. 2222
• Using packet size limit announced by OpenSSH limits@openssh.com extension.
• Improved HTTP error reporting and logging.
• With application logging enabled, automatic updates installation is started with logging too.
• Throwing an exception when Session.SessionLogPath is set to a path with invalid .xml extension. 2215
• Recognizing IP addresses starting with zero in FTP PASV response as unroutable. 2224
• When there is both administrative and non administrative installation, automatic update automatically selects the the correct one for update.
• Not displaying Administrator shield icon on Upgrade button, when Administrator permissions are not needed for the upgrade.
• More meaningful error message when credentials are missing in scripting and .NET assembly.
• Bug fix: WebDAV or S3 certificate that is recognized by Windows Certificate store, but have other issues, cannot be marked trusted by the user. 2191
• Bug fix: Localized HTTP connection error messages are incorrectly decoded. 2197
• Bug fix: Special characters in directory names were not correctly restored when uploading on background with multiple connections for single transfer enabled.
• Bug fix: Master password prompt was not added to taskbar when opening session from commandline or when automatically loading workspace to yet invisible main window.
• Bug fix: Handling download URL does not work when another idle instance is running. 2203
• Bug fix: TLS session resumption is not working for subsequent FTP data connections with TLS 1.3 with some servers. 2210
• Bug fix: Failure when using /browse= switch and a file panel is empty.
• Bug fix: Correcting default OpenSSL configuration paths.
• Bug fix: Potential failure when opening unencrypted HTTP/WebDAV connection.
• Bug fix: When second local panel tree view has focus, some keyboards shortcuts still operated on the first local panel.
• Bug fix: Local file panel malfunctions when it starts on a drive hidden by Explorer’s policy. 2216
• Bug fix: When opening UNC path, the network drive is not added to the other local panel directory tree.
• Bug fix: When opening the UNC path on the second local panel, the network drive is not added to drive drop-down menus.
• Bug fix: Script sometimes does not abort after receiving no answer for prompt, when running in batch mode.
• Bug fix: Configuration reading was broken after an attempt to access a non-existing sub-section within a section existed in raw configuration only.
• Bug fix: WinSCP could ask the server to return more data during SFTP download than it can process. 2218
• Bug fix: Renaming tab invalidated remembered password.
• Bug fix: WinSCP loses focus after custom command is executed. 2221
• Bug fix: Some DLLs were not protected against hijacking. 2223
• Bug fix: Failure when error occurs on secondary shell session with Continue on error option enabled. 2226
• Bug fix: Failure when reconnect on edited/opened file save is canceled. 2228

• MSI installer is not localized anymore to avoid problems with GPO. 2200
• TLS/SSL core upgraded to OpenSSL 1.1.1w.
• Translations updated: Catalan, Danish, Russian and Turkish.
• Added new il-central-1 AWS region.
• Bug fix: Typo in GPL license in installer. 2201
• Bug fix: Check for application updates was limited to TLS 1.2.

• Translations completed: Brazilian Portuguese, Farsi and Portuguese; and updated: French and Italian.
• Support for file masks in Keep local directory up to date extension. 1892.
• TLS/SSL core upgraded to OpenSSL 1.1.1u.
• Bug fix: Patterns in default values of extension options were escaped in an extension tooltip.
• Bug fix: Calculate Directory Sizes command was redundantly in all local panel column context menus.
• Bug fix: Thanks and transitioning help toolbar message in Store installation was not readable in Dark theme. 2198
• Bug fix: MSI installer runs in Catalan language (or possibly fails) when used in GPO. 2199

• Translations completed: Catalan, Czech, Dutch, Finnish, French, German, Hungarian, Italian, Japanese, Korean, Polish, Romanian, Russian, Simplified Chinese, Spanish, Swedish and Turkish.
• Consistently open the nearest existing parent folder when the current local panel directory is deleted. 2182
• Visual feedback when control (drop down list particularly) is focused via keyboard accelerator.
• Building .NET assembly in Visual Studio 2022.
• Bug fix: Remote file pasted to an external HDD is downloaded twice. 2183
• Bug fix: Callstack debug logging in .NET assembly was broken.
• Bug fix: Corrected hint for Default session color command.
• Bug fix: When reading input Stream in .NET assembly upload fails in 64-bit process, the transfer is not interrupted.
• Bug fix: Failure when application log cannot be opened. 2186
• Bug fix: Work around key algorithm naming change in OpenSSH 7.7 and older (from pre-release of PuTTY 0.79). 2188
• Bug fix: With debug logging enabled, the echoed script commands and XML log group names miss the command name.

• When saving edited/opened file, optionally warning if it was modified meanwhile externally. 99
• Autoreconnecting a disconnected session when saving an edited file. 1858
• Even user-disconnected sessions can be reconnected when saving files opened from them.
• Allowed reads with non-zero offsets with stream returned by Session.GetFile. 2181
• puttygen switches --new-passphrase and --old-passphrase are recognized.
• Bug fix: When switching from a remote tab to a local tab, the “right” status bar does not show correct information.
• Bug fix: Edit Link command in Explorer interface has incorrect name Link.
• Bug fix: Mark > Select/Unselect command was behaving incorrectly.
• Bug fix: HTTP proxy authentication prompt was not localized.
• Bug fix: Directory tree does not adjust line height to custom panel font size. 2172
• Bug fix: Green artifacts at partial file icon overlay.
• Bug fix: The first copy&paste or drag&drop of remote files to other application might fail in Explorer interface. 2175
• Bug fix: Temporary directory is left behind when WinSCP is closed while it has some remote files copied to the clipboard. 2176
• Bug fix: Session.EnumerateRemoteFiles does not work correctly when the mask includes brackets and other symbols. 2177
• Bug fix: Location profiles should not be used unless the session is connected.

Older versions