CVE-2026-109350 Gitoxide gix-pack before 0.75.0 Denial of Service via OFS_DELTA Base Distance
Malicious remotes can crash fetch operations in the Gitoxide gix-pack library by sending crafted thin-pack entries, causing a panic.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-109350?
CVE-2026-109350 is a high-severity denial of service vulnerability in GitoxideLabs gix-pack, published on 12 Oct 2026. An attacker can exploit it over the internet without logging in, and only if a user opens a file or follows a link.
Official description
Gitoxide gix-pack before 0.75.0 contains a denial of service vulnerability that allows malicious remotes to crash fetch operations by sending crafted thin-pack OFS_DELTA entries. Attackers can serve a thin pack with a REF_DELTA referencing an existing object followed by an OFS_DELTA whose base_distance exceeds pack_offset, triggering a panic in LookupRefDeltaObjectsIter that aborts the fetch process.
Weakness: CWE-617
Which versions are affected by CVE-2026-109350?
How do I fix CVE-2026-109350?
Upgrade to a fixed version.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-109350 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-109350 exists.
Sources
Also known as DEBIAN-CVE-2026-109350, GHSA-86jp-9qq8-2gwc, GHSA-mpf5-465h-mr53, UBUNTU-CVE-2026-109350.