CVE-2026-88341

5.5 mediumEPSS 0.2%

Medium (5.5). EPSS 0.2% chance of exploitation in the next 30 days.

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.

Severity

CVSS 3.1

5.5 medium

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

EPSS: 0.2% chance of exploitation in the next 30 days; higher than 4% of CVEs (scores of 2026-10-31)
CWE: CWE-617
Published: 2026-09-22
Modified: 2026-09-24
Record from: the NVD, synced 2026-10-19

References

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

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