go-git up to 5.19.1/6.0.0-alpha.4 Worktree Operations path traversal

Summaryinfo

A vulnerability was found in go-git up to 5.19.1/6.0.0-alpha.4. It has been classified as critical. This vulnerability affects unknown code of the component Worktree Operations. This manipulation causes path traversal. The identification of this vulnerability is CVE-2026-71556. It is possible to initiate the attack remotely. There is no exploit available.

Detailsinfo

A vulnerability has been found in go-git up to 5.19.1/6.0.0-alpha.4 and classified as critical. Affected by this vulnerability is an unknown code block of the component Worktree Operations. The manipulation with an unknown input leads to a path traversal vulnerability. The CWE definition for the vulnerability is 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. As an impact it is known to affect confidentiality, integrity, and availability. The summary by CVE is:

go-git is an extensible git implementation library written in pure Go. Prior to 5.19.2 and 6.0.0-alpha.5, worktree operations (including checkout, status, and add) resolve symbolic links inside the working tree without confining resolution to the worktree boundary, so a maliciously crafted repository containing a symlink can cause go-git to read from or write to files outside the intended working directory when the repository is cloned and its worktree operations are used. Versions 5.19.2 and 6.0.0-alpha.5.

The advisory is shared at github.com. This vulnerability is known as CVE-2026-71556 since 08/06/2026. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. It demands that the victim is doing some kind of user interaction. Neither technical details nor an exploit are publicly available. MITRE ATT&CK project uses the attack technique T1006 for this issue.

The vulnerability scanner Nessus provides a plugin with the ID 333378 (Linux Distros Unpatched Vulnerability : CVE-2026-71556), which helps to determine the existence of the flaw in a target environment.

Upgrading to version 5.19.2 or 6.0.0-alpha.5 eliminates this vulnerability.

The vulnerability is also documented in the vulnerability database at Tenable (333378). Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Type

• Versioning Software

Name

• go-git

Version

• 5.19.0
• 5.19.1
• 6.0.0-alpha.0
• 6.0.0-alpha.1
• 6.0.0-alpha.2
• 6.0.0-alpha.3
• 6.0.0-alpha.4

Website

• Product: https://github.com/go-git/go-git/

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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