Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck

CVE-2026-109351Gitoxide gix-pack before 0.75.0 Denial of Service via Pack Header Object Count

Medium 6.5

In plain English

A medium-severity resource allocation without limits in gix-pack from GitoxideLabs. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 25% of all known vulnerabilities).

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.3%top 74.6% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official description

Gitoxide gix-pack before 0.75.0 contains an uncontrolled memory allocation vulnerability that allows remote attackers to abort the process by supplying a huge pack-header object count. Malicious remotes can serve a 12-byte pack header claiming 0xFFFFFFFF objects, forcing Tree::with_capacity to reserve hundreds of gigabytes and crash clone or fetch operations.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:13	rust-gix-pack	no fix listed	DEBIAN-CVE-2026-109351
Debian:14	rust-gix-pack	no fix listed	DEBIAN-CVE-2026-109351
Ubuntu:26.04:LTS	rust-gix	no fix listed	UBUNTU-CVE-2026-109351
Ubuntu:26.10	rust-gix	no fix listed	UBUNTU-CVE-2026-109351

Affected products (as reported)

Vendor	Product	Versions
GitoxideLabs	gix-pack	0 – before 0.75.0

Weakness: CWE-770 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

GitHub Security Advisory (GHSA-x862-c2wj-4mwr) vendor-advisory
VulnCheck Advisory: Gitoxide gix-pack before 0.75.0 Denial of Service via Pack Header Object Count third-party-advisory