CVE-2026-88341: yara · CVE-2026-88341 is a reachable assertion
Affects yaraSource CVE Database V5
Not known to be exploited · CVSS 5.5 Medium.
Data as of 26 Oct 2026, 17:16 UTC
- EPSS
- 0.1% chance of exploitation in 30 days – higher than 4% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:HExploitation evidence
Disclosed: evidence found.
CVE published 22 Sep 2026
Detectable: no evidence on record.
No public nuclei template indexed
Weaponised: no evidence on record.
No public exploit code indexed in Metasploit or Exploit-DB
Exploited in the wildExploited: no evidence on record.
Not in CISA KEV and no source reports exploitation
Observed by OffSeq MirageSeen by Mirage: no evidence on record.
No attack traffic recorded by OffSeq Mirage sensors
A missing step is not evidence of safety. Sources: cve.org (opens in a new tab), the Metasploit, Exploit-DB and nuclei-templates index as of 26 Oct 2026.
What to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
GitHubvirustotal/yarapkg:github/virustotal/yaraOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Users should monitor vendor advisories for updates. Until a fix is available, avoid loading untrusted or crafted .yrc compiled rule files to prevent triggering the assertion failure.
Description
CVE-2026-88341 is a reachable assertion vulnerability in YARA version 4.5.8. It occurs when loading specially crafted compiled rule files (.yrc) with an invalid arena configuration (num_buffers=0), causing an assertion failure that terminates the application. The vulnerability has a medium severity rating with a CVSS score of 5.5 and impacts availability without affecting confidentiality or integrity.