---
id: CVE-2026-33762
title: go-git is an extensible git implementation library written in pure Go
summary: >-
  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 n…
severity: low
cvss: 2.8
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:L'
cwe:
  - CWE-129
vendor: go-git_project
product: go-git
affected:
  - go-git < 5.17.1
patched:
  - go-git 5.17.1
published: '2026-03-31'
updated: '2026-07-24'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-33762'
references:
  - url: 'https://github.com/go-git/go-git/releases/tag/v5.17.1'
    label: security-advisories@github.com
  - url: 'https://github.com/go-git/go-git/security/advisories/GHSA-gm2x-2g9h-ccm8'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00153
epssPercentile: 0.04821
ingestedAt: '2026-07-24T21:39:13.250Z'
---

## Overview

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.

## Affected

- `go-git < 5.17.1`

## Remediation

Upgrade past the affected range:

- `go-git 5.17.1`