CVE-2026-88341 Denial of service in n/a
An attacker can cause a denial of service in YARA by providing a crafted rule file that triggers an assertion failure.
- 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-2026-88341?
CVE-2026-88341 is a medium-severity denial of service vulnerability in n/a, published on 22 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
A reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted .yrc compiled rule files. An attacker can provide a malicious file with an invalid arena configuration (num_buffers=0) that triggers an assertion failure in yr_arena_get_ptr(), causing the application to terminate.
Weakness: CWE-617
Which versions are affected by CVE-2026-88341?
How do I fix CVE-2026-88341?
No fix has been published for CVE-2026-88341 yet. Limit exposure of the affected software until one is available.
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-2026-88341 being exploited?
It is not confirmed as exploited in the wild, but public exploit code for CVE-2026-88341 exists.
Sources
Also known as DEBIAN-CVE-2026-88341, GHSA-q333-36q9-7h8m, UBUNTU-CVE-2026-88341.