---
id: CVE-2026-109349
title: >-
  gitoxide gix-pack before 0.75.0 contains a reachable assertion in
  BytesToEntriesIter::new_from_header: the pack header decoder accepts version
  3, but a release-enabled assert_eq! requires version 2
summary: >-
  gitoxide gix-pack before 0.75.0 contains a reachable assertion in
  BytesToEntriesIter::new_from_header: the pack header decoder accepts version
  3, but a release-enabled assert_eq! requires version 2. A malicious remote can
  send a 12-byte …
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'
cwe:
  - CWE-617
published: '2026-10-12'
updated: '2026-10-12'
sourceUpdated: '2026-10-12T17:17:31.823'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-109349'
references:
  - url: >-
      https://github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-633h-mqjc-8rwg
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/gix-pack-before-0.75.0-reachable-assertion-dos-via-pack-version-3-header
    label: disclosure@vulncheck.com
tags:
  - nvd
ingestedAt: '2026-10-12T18:00:08.210Z'
---

## Overview

gitoxide gix-pack before 0.75.0 contains a reachable assertion in BytesToEntriesIter::new_from_header: the pack header decoder accepts version 3, but a release-enabled assert_eq! requires version 2. A malicious remote can send a 12-byte pack header declaring version 3 to panic the client and abort the clone or fetch.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.