CVE-2026-34165
Medium
Description
go-git is an extensible git implementation library written in pure Go. From version 5.0.0 to before version 5.17.1, a vulnerability has been identified in which a maliciously crafted .idx file can cause asymmetric memory consumption, potentially exhausting available memory and resulting in a denial-of-service (DoS) condition. Exploitation requires write access to the local repository's .git directory, it order to create or alter existing .idx files. This issue has been patched in version 5.17.1.
SeverityMedium
CVSS5.0
Exploit probability—
ProductGo-git
PublishedMar 31, 2026
First seenMar 31, 2026
How to fix
Update
- go-git_project go-git5.17.1 or later
- github.com/go-git/go-git/v55.17.1 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| go-git_project go-git | 5.0.0 ≤ v < 5.17.1 | 5.17.1 |
| github.com/go-git/go-git/v5Go | 5.0.0 ≤ v < 5.17.1 | 5.17.1 |
| github.com/go-git/go-gitGo | No range specified | — |
| github.com/go-git/go-git/v4Go | No range specified | — |
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