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    CVE-2026-33144

    GPAC is an open-source multimedia framework. Prior to commit 86b0e36, a heap-based buffer overflow (write) vulnerability was discovered in GPAC MP4Box. The vulnerability exists in the gf_xml_parse_bit_sequence_bs function in utils/xml_bin_custom.c when processing a crafted NHML file containing malicious <BS> (BitSequence) elements. An attacker can exploit this by providing a specially crafted NHML file, causing an out-of-bounds write on the heap. This issue has been via commit 86b0e36.

    Published:Mar 20, 2026
    Last Modified:Apr 15, 2026
    EPS:Mar 20, 2026
    EPSS Score:0.00016
    CVSS Score:5.8

    Affected Products

    Vendor
    Gpac
    Product
    Gpac

    Exploits

    https://github.com/gpac/gpac/security/advisories/GHSA-3jw5-9pmw-vmfghttps://github.com/gpac/gpac/security/advisories/GHSA-3jw5-9pmw-vmfg

    Common Weakness Enumeration

    CWE-787 Out-of-bounds Write

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

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    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