---
id: CVE-2026-34165
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. 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,
  pot…
severity: medium
cvss: 5
cvssVector: 'CVSS:3.1/AV:L/AC:L/PR:L/UI:R/S:U/C:N/I:N/A:H'
cwe:
  - CWE-191
  - CWE-770
vendor: go-git_project
product: go-git
affected:
  - 'go-git >= 5.0.0, < 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-2026-34165'
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-jhf3-xxhw-2wpp'
    label: security-advisories@github.com
tags:
  - nvd
epss: 0.00148
epssPercentile: 0.03292
ingestedAt: '2026-07-24T21:39:13.326Z'
---

## Overview

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.

## Affected

- `go-git >= 5.0.0, < 5.17.1`

## Remediation

Upgrade past the affected range:

- `go-git 5.17.1`