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Vulnerability record · CVE-2026-34165 · published 31 March 2026

CVE-2026-34165: Go-git project go-git allocation without limits vulnerability

GGo Git Project · Go Git

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.

5.0 CVSS 3.1 Medium EPSS 0.15% · top 96.7% CWE-191 · CWE-191CWE-770 · Allocation without limits
5.0CVSS 3.1 base score
0.15%EPSS exploitation probability, 30 days
NoNot in CISA KEV
1Affected product versions listed by NVD
2References
24 Jul 2026Last modified by NVD

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.

CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

References

LinkTags
https://github.com/go-git/go-git/releases/tag/v5.17.1 ProductRelease Notes
https://github.com/go-git/go-git/security/advisories/GHSA-jhf3-xxhw-2wpp Vendor Advisory

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-34165), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.