What’s Vulnerable › Vulnerabilities

CVE-2026-88341

• Severity: medium (CVSS 5.5 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.2% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-22 · updated 2026-09-24
• Weakness: CWE-617

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.

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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