Vulnerability · Published Oct 12, 2026 · Assigned by VulnCheck
CVE-2026-109348Gitoxide gix-mailmap before 0.35.0 CPU Denial of Service via .mailmap Parsing
Medium 4.3
In plain English
A medium-severity security flaw in gix-mailmap 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 22% of all known vulnerabilities).
Severity (CVSS 3.1)4.3Medium
Exploit odds (30 days)0.3%top 77.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
Official description
Gitoxide gix-mailmap before 0.35.0 contains a denial of service vulnerability that allows attackers to exhaust CPU through quadratic-time parsing in Snapshot::from_bytes. Attackers can commit a crafted .mailmap with descending-ordered entries forcing repeated front inserts, blocking workers running log, blame, or shortlog for minutes.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:13 | rust-gix-mailmap | no fix listed | DEBIAN-CVE-2026-109348 |
| Debian:14 | rust-gix-mailmap | no fix listed | DEBIAN-CVE-2026-109348 |
| Ubuntu:26.04:LTS | rust-gix | no fix listed | UBUNTU-CVE-2026-109348 |
| Ubuntu:26.10 | rust-gix | no fix listed | UBUNTU-CVE-2026-109348 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| GitoxideLabs | gix-mailmap | 0 – before 0.35.0 |
Weakness: CWE-407 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L
References
- GitHub Security Advisory (GHSA-pmpw-wwcm-r8rc) vendor-advisory
- VulnCheck Advisory: Gitoxide gix-mailmap before 0.35.0 CPU Denial of Service via .mailmap Parsing third-party-advisory