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    CVE-2026-27821

    GPAC is an open-source multimedia framework. In versions up to and including 26.02.0, a stack buffer overflow occurs during NHML file parsing in `src/filters/dmx_nhml.c`. The value of the xmlHeaderEnd XML attribute is copied from att->value into szXmlHeaderEnd[1000] using strcpy() without any length validation. If the input exceeds 1000 bytes, it overwrites beyond the stack buffer boundary. Commit 9bd7137fded2db40de61a2cf3045812c8741ec52 patches the issue.

    Published:Feb 26, 2026
    Last Modified:Apr 17, 2026
    EPS:Feb 26, 2026
    EPSS Score:0.00044
    CVSS Score:7.8

    Affected Products

    Vendor
    Gpac
    Product
    Gpac

    Exploits

    https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559https://github.com/gpac/gpac/security/advisories/GHSA-q7qh-8r2r-q559

    Common Weakness Enumeration

    CWE-121 Stack-based Buffer Overflow

    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