CVE-2026-88341CWE-617

CVE-2026-88341

Medium · published September 23, 2026

CVSS v3.1
5.5
EPSS
0%
Percentile
5.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
5.5 · MEDIUM
Vector
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H
CVSS v4.0
Not supplied
EPSS
0.00168 · 5.9th percentile
Weakness
CWE-617 · Reachable Assertion
Published
2026-09-23T00:17Z
References (3)
https://github.com/NOUIY/yara/commit/0cdff36723cd260243bb2b330bda555693354760 · [email protected]https://github.com/VirusTotal/yara/issues/2238 · [email protected]https://github.com/VirusTotal/yara/issues/2238 · 134c704f-9b21-4f2e-91b3-4a467353bcc0
EPSS history
Timeline
  • 24 SEP 03:25Z
    EPSS moved — → 0%
    epss
  • 22 SEP 00:00Z
    A reachable assertion vulnerability exists in YARA 4.5.8 when loading crafted .yrc compiled rule files
    cvelistv5