CVE-2026-109349GHSA-633h-mqjc-8rwg
gix-pack before 0.75.0 Reachable Assertion DoS via Pack Version 3 Header
GitoxideLabs gix-pack
CVSS
7.1HighExploitationNo known exploitationNot in CISA KEV, which does not prove it is unexploitedCISA KEV
Exploit odds (EPSS)0.27%Chance of exploitation activity in the next 30 days, higher than 18% of CVEs. Scored 23 Oct 2026FIRST EPSS
What fixes it
- 0.75.0gix-packCVE List
A fixed version on one release line is not the upgrade target for every line. Check your exact version and any vendor backports.
Description
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.
Text from CVE List
Affected versions 2
- gix-packaffected: all versions before 0.75.0CVE List
- gix-packunaffected: 0.75.0CVE List