CVE-2026-77797 Velociraptor Prefetch parser out of bounds
An attacker can cause a crash in Velociraptor by providing a malformed prefetch file, impacting availability for forensic analysts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- None listed
What is CVE-2026-77797?
CVE-2026-77797 is a low-severity memory corruption vulnerability in Rapid7 Velociraptor, published on 24 Sep 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official description
Velociraptor's prefetch library contains an out of bound vulnerability which may cause a crash when parsing certain malformed prefetch files.
Which versions are affected by CVE-2026-77797?
How do I fix CVE-2026-77797?
No fix has been published for CVE-2026-77797 yet. Limit exposure of the affected software until one is available.
Upgrade to the fixed version. Memory-safe languages, compiler hardening and fuzzing prevent most new cases. More about Memory corruption.
Is CVE-2026-77797 being exploited?
There is no known exploitation of CVE-2026-77797 in the wild and no public exploit code.
Sources
Also known as GHSA-4f8c-84gc-p8pv.