CVE-2026-72903: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Eugeny tabby
Tabby (formerly Terminus) is a highly configurable terminal emulator. Prior to 1.0.235, a malicious SFTP server can return a backslash traversal filename through entry.name. In tabby-ssh/src/session/sftp.ts, SFTPSession.readdir() and _makeFile() use POSIX path processing that preserves the backslashes as ordinary filename characters. In tabby-ssh/src/components/sftpPanel.component.ts, downloadFolderRecursive() propagates item.name into the local relative path. In tabby-electron/src/services/platform.service.ts, ElectronDirectoryDownload.createFile() passes that path to Windows-native path.join(), and in tabby-electron/src/sftpContextMenu.ts, EditSFTPContextMenu.edit() passes item.name to path.join() for the temporary edit path. Windows interprets the preserved backslashes and parent-directory components as traversal, allowing attacker-controlled content to be created or overwritten outside the selected download directory or temporary edit directory. This issue is fixed in version 1.0.235.
AI Analysis
Technical Summary
Tabby (formerly Terminus) versions before 1.0.235 contain a path traversal vulnerability (CWE-22) in their SFTP client implementation. Specifically, when interacting with a malicious SFTP server, filenames containing backslash characters are not properly sanitized. The SFTPSession.readdir() and _makeFile() functions use POSIX path processing that preserves backslashes as ordinary characters, but later Windows-native path.join() calls interpret these backslashes as directory traversal sequences. This allows attacker-controlled filenames to cause files to be created or overwritten outside the intended download or temporary edit directories on Windows hosts. The issue is resolved in Tabby version 1.0.235.
Potential Impact
An attacker controlling an SFTP server can cause Tabby clients to write or overwrite files outside of the designated download or temporary edit directories on Windows systems. This can lead to arbitrary file creation or modification, potentially impacting system integrity and availability. The CVSS v3.1 score is 8.1 (High), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, but high integrity and availability impact.
Mitigation Recommendations
This vulnerability is fixed in Tabby version 1.0.235. Users should upgrade to version 1.0.235 or later to remediate this issue. No other mitigation or temporary workaround is documented. Since this is not a cloud service, remediation depends on applying the official fix.
CVE-2026-72903: CWE-22: Improper Limitation of a Pathname to a Restricted Directory ('Path Traversal') in Eugeny tabby
Description
Tabby (formerly Terminus) is a highly configurable terminal emulator. Prior to 1.0.235, a malicious SFTP server can return a backslash traversal filename through entry.name. In tabby-ssh/src/session/sftp.ts, SFTPSession.readdir() and _makeFile() use POSIX path processing that preserves the backslashes as ordinary filename characters. In tabby-ssh/src/components/sftpPanel.component.ts, downloadFolderRecursive() propagates item.name into the local relative path. In tabby-electron/src/services/platform.service.ts, ElectronDirectoryDownload.createFile() passes that path to Windows-native path.join(), and in tabby-electron/src/sftpContextMenu.ts, EditSFTPContextMenu.edit() passes item.name to path.join() for the temporary edit path. Windows interprets the preserved backslashes and parent-directory components as traversal, allowing attacker-controlled content to be created or overwritten outside the selected download directory or temporary edit directory. This issue is fixed in version 1.0.235.
CVSS v3.1
Score 8.1high
Affected software
Eugeny
tabby
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Weaknesses
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
Tabby (formerly Terminus) versions before 1.0.235 contain a path traversal vulnerability (CWE-22) in their SFTP client implementation. Specifically, when interacting with a malicious SFTP server, filenames containing backslash characters are not properly sanitized. The SFTPSession.readdir() and _makeFile() functions use POSIX path processing that preserves backslashes as ordinary characters, but later Windows-native path.join() calls interpret these backslashes as directory traversal sequences. This allows attacker-controlled filenames to cause files to be created or overwritten outside the intended download or temporary edit directories on Windows hosts. The issue is resolved in Tabby version 1.0.235.
Potential Impact
An attacker controlling an SFTP server can cause Tabby clients to write or overwrite files outside of the designated download or temporary edit directories on Windows systems. This can lead to arbitrary file creation or modification, potentially impacting system integrity and availability. The CVSS v3.1 score is 8.1 (High), reflecting network attack vector, low attack complexity, no privileges required, user interaction required, unchanged scope, no confidentiality impact, but high integrity and availability impact.
Mitigation Recommendations
This vulnerability is fixed in Tabby version 1.0.235. Users should upgrade to version 1.0.235 or later to remediate this issue. No other mitigation or temporary workaround is documented. Since this is not a cloud service, remediation depends on applying the official fix.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-08-10T17:57:26.142Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a7a3b18bf8831d53985675e
Added to database: 08/10/2026, 20:56:56 UTC
Last enriched: 08/10/2026, 21:11:09 UTC
Last updated: 09/24/2026, 01:47:44 UTC
Views: 71
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