What is CVE-2026-109349?

CVE-2026-109349 is a medium-severity vulnerability in Gitoxidelabs Gix-Pack, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-10-12.

How severe is CVE-2026-109349?

Medium severity. CVSS v3 base score is 6.5 out of 10.

Vulnerability in Gitoxidelabs Gix-Pack

CVE-2026-109349

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.

Published 2026-10-12.

CVSS v3 metric

CVSS v3 base score 6.5 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H.

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-Pack

Weakness classification (CWE)

CWE-617 — Reachable Assertion

References

github.com/GitoxideLabs/gitoxide/security/advisories/GHSA-633h-mqjc-8rwg (vendor-advisory)
www.vulncheck.com/advisories/gix-pack-before-0.75.0-reachable-assertion-dos-via… (third-party-advisory)

Frequently asked questions

What is CVE-2026-109349?: CVE-2026-109349 is a medium-severity vulnerability in Gitoxidelabs Gix-Pack, classified under Reachable Assertion. CVSS score: 6.5/10. Published 2026-10-12.
How severe is CVE-2026-109349?: Medium severity. CVSS v3 base score is 6.5 out of 10.