CVE-2026-25934
MEDIUM
GHSA-37cx-329c-33x3
CVSS Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Lifecycle Timeline
3Description
go-git is a highly extensible git implementation library written in pure Go. Prior to 5.16.5, a vulnerability was discovered in go-git whereby data integrity values for .pack and .idx files were not properly verified. This resulted in go-git potentially consuming corrupted files, which would likely result in unexpected errors such as object not found. For context, clients fetch packfiles from upstream Git servers. Those files contain a checksum of their contents, so that clients can perform integrity checks before consuming it. The pack indexes (.idx) are generated locally by go-git, or the git cli, when new .pack files are received and processed. The integrity checks for both files were not being verified correctly. This vulnerability is fixed in 5.16.5.
Analysis
Corrupted Git pack and index files are not properly validated in go-git versions before 5.16.5, allowing an attacker to supply malicious packfiles that bypass integrity checks and cause go-git to consume corrupted data. This can result in unexpected application errors and denial of service conditions for any system using the vulnerable go-git library to fetch or process Git repositories. …
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Remediation
Within 30 days: Identify affected systems running pure Go. and apply vendor patches as part of regular patch cycle. …
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