What is CVE-2026-109348?

CVE-2026-109348 is a medium-severity vulnerability in Gitoxidelabs Gix-Mailmap, classified under Inefficient Algorithmic Complexity. CVSS score: 4.3/10. Published 2026-10-12.

How severe is CVE-2026-109348?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Gitoxidelabs Gix-Mailmap

CVE-2026-109348

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.

Published 2026-10-12.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:L.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Gitoxidelabs Gix-Mailmap

Weakness classification (CWE)

CWE-407 — Inefficient Algorithmic Complexity

References

github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-pmpw-wwcm-r8rc (vendor-advisory)
www.vulncheck.com/advisories/gitoxide-gix-mailmap-before-0.35.0-cpu-denial-of-s… (third-party-advisory)

Frequently asked questions

What is CVE-2026-109348?: CVE-2026-109348 is a medium-severity vulnerability in Gitoxidelabs Gix-Mailmap, classified under Inefficient Algorithmic Complexity. CVSS score: 4.3/10. Published 2026-10-12.
How severe is CVE-2026-109348?: Medium severity. CVSS v3 base score is 4.3 out of 10.