Is CVE-2026-109349 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-109349?

CVE-2026-109349 has a CVSS v3 severity of MEDIUM (6.5).

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CVE-2026-109349

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.