CVE-2026-88341
Medium
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.
SeverityMedium
CVSS5.5
Exploit probability—
ProductYARA
PublishedSep 22, 2026
First seenSep 22, 2026
Weakness typeCWE-617CWE-617
How to fix
Sources list no fixed version or patch link for this vulnerability.
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| YARA YARA | 4.5.8 | — |
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