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    CVE-2026-26967

    PJSIP is a free and open source multimedia communication library written in C. In versions 2.16 and below, there is a critical Heap-based Buffer Overflow vulnerability in PJSIP's H.264 unpacketizer. The bug occurs when processing malformed SRTP packets, where the unpacketizer reads a 2-byte NAL unit size field without validating that both bytes are within the payload buffer bounds. The vulnerability affects applications that receive video using H.264. A patch is available at https://github.com/pjsip/pjproject/commit/f821c214e52b11bae11e4cd3c7f0864538fb5491.

    Published:Feb 20, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 20, 2026
    EPSS Score:0.00014
    CVSS Score:5.3

    Affected Products

    Vendor
    Pjsip
    Product
    Pjproject
    Vendor
    Pjsip
    Product
    Pjsip

    Exploits

    No exploit reference

    Related CVEs

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    CVE-2026-57164 (CVSS 8.3) — PJSIP is a free and open source multimedia communication library written in C. Prior to commit 8d5956a, a heap…
    CVE-2026-57163 (CVSS 8.8) — PJSIP is a free and open source multimedia communication library written in C. Prior to commit c4a151a, a stac…
    CVE-2026-57162 (CVSS 8.8) — PJSIP is a free and open source multimedia communication library written in C. Prior to commit a1b707c, a stac…
    CVE-2026-57161 (CVSS 8.8) — PJSIP is a free and open source multimedia communication library written in C. Prior to commit acc03b5, a stac…
    CVE-2026-57160 (CVSS 6.9) — PJSIP is a free and open source multimedia communication library written in C. Prior to commit d6a0e7f, a buff…
    CVE-2026-57159 (CVSS 8.4) — PJSIP is a free and open source multimedia communication library written in C. Prior to commit 673b978, a remo…
    CVE-2026-42225 (CVSS 8.2) — PJSIP is a free and open source multimedia communication library written in C. Prior to version 2.17, on GnuTL…
    CVE-2026-41416 (CVSS 8.1) — PJSIP is a free and open source multimedia communication library written in C. In 2.16 and earlier, there is a…

    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