CVE-2026-72903
Received Received - Intake

Path Traversal in Tabby Terminal Emulator

Vulnerability report for CVE-2026-72903, including description, CVSS score, EPSS score, affected products, exploitability, helpful resources, and attack-flow context.

Publication date: 2026-08-10

Last updated on: 2026-08-10

Assigner: GitHub, Inc.

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 Scores

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Meta Information

Published
2026-08-10
Last Modified
2026-08-10
Generated
2026-08-11
AI Q&A
2026-08-11
EPSS Evaluated
N/A
NVD

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
tabby tabby 1.0.235

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-22 The product uses external input to construct a pathname that is intended to identify a file or directory that is located underneath a restricted parent directory, but the product does not properly neutralize special elements within the pathname that can cause the pathname to resolve to a location that is outside of the restricted directory.

Attack-Flow Graph

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Executive Summary

This vulnerability in Tabby terminal emulator (before version 1.0.235) involves a malicious SFTP server sending a filename with backslash traversal characters. The application incorrectly processes these backslashes as normal characters in POSIX paths, allowing directory traversal when the path is later used on Windows systems. This can lead to files being created or overwritten outside intended directories.

Impact Analysis

An attacker could exploit this to overwrite important system files, modify application data, or place malicious files in sensitive locations on your Windows system. This could lead to system compromise, data loss, or allow further attacks. Users downloading files from untrusted SFTP servers are most at risk.

Compliance Impact

This vulnerability could violate compliance requirements by allowing unauthorized file access or modification. For GDPR, it may lead to unauthorized data processing or access. For HIPAA, it could compromise protected health information integrity. Organizations must ensure proper file handling to maintain compliance.

Mitigation Strategies

Update Tabby to version 1.0.235 or later to address the vulnerability. Avoid downloading files from untrusted SFTP servers until patched.

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