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VulnerabilityPublished Updated

CVE-2026-88340: YARA · CVE-2026-88340 is a high-severity

Source CVE Database V5

0

Not known to be exploited · CVSS 7.6 High.

Data as of 26 Oct 2026, 17:16 UTC

CVSS 3.1 base score
7.6High
How severe the flaw is on the 0–10 CVSS scale.
EPSS
0.2% chance of exploitation in 30 days – higher than 16% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:H

Exploitation evidence

  1. Disclosed: evidence found.

    CVE published 22 Sep 2026

  2. Detectable: no evidence on record.

    No public nuclei template indexed

  3. Weaponised: no evidence on record.

    No public exploit code indexed in Metasploit or Exploit-DB

  4. Exploited in the wild: no evidence on record.

    Not in CISA KEV and no source reports exploitation

  5. Observed by OffSeq 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

AI-suggested

Until an official fix is available, avoid processing untrusted or unauthenticated .yrc compiled rule files to mitigate risk.

Description

CVE-2026-88340 is a high-severity vulnerability in YARA 4.5.8 involving invalid pointer release during deserialization of compiled .yrc rule files. It arises from insufficient validation of external-variable pointers, potentially causing memory corruption and application crashes when processing specially crafted .yrc files.

References

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