go-git is an extensible git implementation library written in pure Go. Prior to version 5.17.1, go-git’s index decoder for format version 4 fails to validate the path name prefix length before applying it to the previously decoded path name. A maliciously crafted index file can trigger an out-of-bounds slice operation, resulting in a runtime panic during normal index parsing. This issue only affects Git index format version 4. Earlier formats (go-git supports only v2 and v3) are not vulnerable to this issue. This issue has been patched in version 5.17.1.

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Advisories
Source ID Title
Github GHSA Github GHSA GHSA-gm2x-2g9h-ccm8 go-git missing validation decoding Index v4 files leads to panic
Fixes

Solution

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Workaround

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History

Tue, 31 Mar 2026 14:30:00 +0000

Type Values Removed Values Added
Description go-git is an extensible git implementation library written in pure Go. Prior to version 5.17.1, go-git’s index decoder for format version 4 fails to validate the path name prefix length before applying it to the previously decoded path name. A maliciously crafted index file can trigger an out-of-bounds slice operation, resulting in a runtime panic during normal index parsing. This issue only affects Git index format version 4. Earlier formats (go-git supports only v2 and v3) are not vulnerable to this issue. This issue has been patched in version 5.17.1.
Title go-git: Missing validation decoding Index v4 files leads to panic
Weaknesses CWE-129
References
Metrics cvssV3_1

{'score': 2.8, 'vector': 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L'}


Projects

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cve-icon MITRE

Status: PUBLISHED

Assigner: GitHub_M

Published:

Updated: 2026-03-31T18:53:08.221Z

Reserved: 2026-03-23T18:30:14.126Z

Link: CVE-2026-33762

cve-icon Vulnrichment

No data.

cve-icon NVD

Status : Received

Published: 2026-03-31T15:16:15.597

Modified: 2026-03-31T15:16:15.597

Link: CVE-2026-33762

cve-icon Redhat

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cve-icon OpenCVE Enrichment

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Weaknesses