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    CVE-2026-88341

    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.

    Published:Sep 22, 2026
    Last Modified:Sep 23, 2026
    EPS:Sep 22, 2026
    EPSS Score:0.00198
    CVSS Score:5.5

    Affected Products

    Vendor
    Virustotal
    Product
    Yara

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-617 Reachable Assertion

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-88340 (CVSS 7.6) — An invalid pointer release vulnerability exists in YARA 4.5.8 during deserialization of compiled .yrc rule fil…
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    CVE-2021-45429 (CVSS 5.5) — A Buffer Overflow vulnerablity exists in VirusTotal YARA git commit: 605b2edf07ed8eb9a2c61ba22eb2e7c362f47ba7 …
    CVE-2021-3402 (CVSS 9.1) — An integer overflow and several buffer overflow reads in libyara/modules/macho/macho.c in YARA v4.0.3 and earl…
    CVE-2019-19648 (CVSS 7.8) — In the macho_parse_file functionality in macho/macho.c of YARA 3.11.0, command_size may be inconsistent with t…
    CVE-2019-5020 (CVSS 5.5) — An exploitable denial of service vulnerability exists in the object lookup functionality of Yara 3.8.1. A spec…
    CVE-2018-19974 (CVSS 5.5) — In YARA 3.8.1, bytecode in a specially crafted compiled rule can read uninitialized data from VM scratch memor…
    CVE-2018-19976 (CVSS 5.5) — In YARA 3.8.1, bytecode in a specially crafted compiled rule is exposed to information about its environment, …
    CVE-2018-19975 (CVSS 5.5) — In YARA 3.8.1, bytecode in a specially crafted compiled rule can read data from any arbitrary address in memor…
    CVE-2018-12035 (CVSS 7.8) — In YARA 3.7.1 and prior, parsing a specially crafted compiled rule file can cause an out of bounds write vulne…

    Common Vulnerability Scoring System

    Attack Vector
    Network
    Adjacent
    Local
    Physical
    Privileges Required
    None
    Low
    High
    User Interaction
    None
    Required
    Scope
    Unchanged
    Changed
    Confidentiality
    None
    Low
    High
    Integrity
    None
    Low
    High
    Availability
    None
    Low
    High