CVE-2026-88341

MEDIUMCVSS 5.5

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.

Timeline

Published:September 22nd, 2026 8:17 PM

Last modified:September 24th, 2026 9:08 PM

CVSS Scoring

CVSS v3: 5.5 (MEDIUM)

CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Weaknesses (CWE)

CWE-617

References & Reports

Advisories, patches, and third-party reports

https://github.com/NOUIY/yara/commit/0cdff36723cd260243bb2b330bda555693354760
https://github.com/VirusTotal/yara/issues/2238
https://github.com/VirusTotal/yara/issues/2238

Source: NIST NVD · Data may lag official sources by up to one minute