CVE-2026-88340 YARA - Insecure Deserialization

YARA 4.5.8 contains an insecure deserialization vulnerability caused by insufficient validation of external-variable pointers during deserialization of compiled .yrc rule files, letting attackers cause memory corruption and application crash, exploit requires crafted .yrc file.

CVSS base score 7.6 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.25% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Insecure Deserialization
Impact
Denial Of Service
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H
Published
22 September 2026
Updated
15 October 2026
Weakness
CWE-763

Vendor fix

Update to the latest version of YARA.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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