---
id: GHSA-w5pp-99ch-qj29
aliases:
  - GO-2026-5693
title: 'go-git: Malformed Git object data may cause panics or resource exhaustion'
summary: 'go-git: Malformed Git object data may cause panics or resource exhaustion'
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
vendor: go-git
product: github.com/go-git/go-git/v5
ecosystem: go
affected:
  - github.com/go-git/go-git/v5 < 5.19.1
  - github.com/go-git/go-git/v6 < 6.0.0-alpha.4
patched:
  - github.com/go-git/go-git/v5 5.19.1
  - github.com/go-git/go-git/v6 6.0.0-alpha.4
published: '2026-05-29'
updated: '2026-07-24'
source: OSV
sourceUrl: 'https://osv.dev/vulnerability/GHSA-w5pp-99ch-qj29'
references:
  - url: 'https://github.com/go-git/go-git/security/advisories/GHSA-w5pp-99ch-qj29'
  - url: 'https://github.com/go-git/go-git'
tags:
  - osv
  - go
ingestedAt: '2026-07-25T19:08:12.054Z'
---

## Overview

### Impact
Several denial-of-service issues were identified in `go-git` when parsing maliciously crafted Git repository data.

An attacker may craft a malicious `.pack`, `.idx` or loose objects that causes an application using an affected version of `go-git` to panic or consume excessive resources.

This can lead to denial of service in applications that use `go-git` to clone, fetch, open, or otherwise process untrusted repositories or Git object data.

Exploitation requires the ability to alter read-only files such as `.pack` or `.idx` from the local repository's `.git/objects/pack/` directory. Alternatively, the user would need to be interacting with a malicious remote server, which is not recommended and exposes users to a broader class of security risks beyond this issue.

### Patches
Users should upgrade to a patched version in order to mitigate this vulnerability. Versions prior to `v5` are likely to be affected, users are recommended to upgrade to a supported `go-git` version.

### Credits
go-git thanks @kodareef5, @AyushParkara and @N0zoM1z0 for reporting this in four separate reports. 🙇

## Affected packages

- `github.com/go-git/go-git/v5 < 5.19.1`
- `github.com/go-git/go-git/v6 < 6.0.0-alpha.4`

## Remediation

Upgrade to a patched release:

- `github.com/go-git/go-git/v5 5.19.1`
- `github.com/go-git/go-git/v6 6.0.0-alpha.4`