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High severity7.5GHSA Advisory· Published May 27, 2026· Updated Jun 4, 2026

CVE-2026-45022

CVE-2026-45022

Description

go-git is an extensible git implementation library written in pure Go. Prior to 5.19.0 and 6.0.0-alpha.3, go-git may parse malformed Git objects in a way that differs from upstream Git. When commit or tag objects contain ambiguous or malformed headers, go-git’s decoded representation may expose values differently from how Git itself would interpret or reject the same object. Additionally, go-git’s commit signing and verification logic operates over commit data reconstructed from go-git’s parsed representation rather than the original raw object bytes. As a result, go-git may sign or verify a commit payload that is not byte-for-byte equivalent to the object stored in the repository. This can cause a signature to appear valid for a commit whose displayed or effective metadata differs from the object that was intended to be signed. This vulnerability is fixed in 5.19.0 and 6.0.0-alpha.3.

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Affected packages

Versions sourced from the GitHub Security Advisory.

PackageAffected versionsPatched versions
github.com/go-git/go-git/v6Go
>= 6.0.0-alpha.1, < 6.0.0-alpha.36.0.0-alpha.3
github.com/go-git/go-git/v5Go
< 5.19.05.19.0

Affected products

285

Patches

Vulnerability mechanics

References

3

News mentions

0

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