Vulnerability · Published Sep 22, 2026 · Assigned by mitre
CVE-2026-88341
Medium 5.5
In plain English
A medium-severity security flaw in the yara package (Debian). Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.2% (higher than 4% of all known vulnerabilities).
Severity (CVSS 3.1)5.5Medium
Exploit odds (30 days)0.2%top 95.7% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known
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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | yara | no fix listed | DEBIAN-CVE-2026-88341 |
| Debian:13 | yara | no fix listed | DEBIAN-CVE-2026-88341 |
| Debian:14 | yara | no fix listed | DEBIAN-CVE-2026-88341 |
| Ubuntu:24.04:LTS | yara | no fix listed | UBUNTU-CVE-2026-88341 |
| Ubuntu:26.04:LTS | yara | no fix listed | UBUNTU-CVE-2026-88341 |
| Ubuntu:26.10 | yara | no fix listed | UBUNTU-CVE-2026-88341 |
Affected products (as reported)
Weakness: CWE-617 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H