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    CVE-2026-128239

    GPAC through 26.07.0 contains a NULL pointer dereference vulnerability in the MPEG-4 Form spatial-constraint handlers in src/compositor/mpeg4_form.c that lets attackers crash the process via unchecked group lookups. Attackers can supply a crafted XMT scene whose Form constraints reference a non-existent group, crashing tools like MP4Box during chapter import for denial of service.

    Published:Nov 13, 2026
    Last Modified:Nov 13, 2026
    EPS:Nov 13, 2026
    EPSS Score:
    CVSS Score:5.5

    Affected Products

    Vendor
    Gpac
    Product
    Gpac

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-476 NULL Pointer Dereference

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-128240 (CVSS 6.8) — GPAC through 26.07.0 contains a use-after-free vulnerability in gf_sg_proto_del() in src/scenegraph/vrml_proto…
    CVE-2026-124031 (CVSS 6.8) — GPAC through 26.07.0 contains a type confusion vulnerability in drawable_get_aspect_2d_mpeg4() and TraverseSha…
    CVE-2026-124030 (CVSS 6.8) — GPAC through 26.07.0 contains a type confusion vulnerability in gf_sg_command_apply() in src/scenegraph/comman…
    CVE-2026-109827 (CVSS 2.1) — A vulnerability has been found in GPAC up to 26.07.0. This vulnerability affects the function gf_m2ts_decode_a…
    CVE-2026-108539 (CVSS 2.1) — A vulnerability was detected in GPAC up to 26.07.0. This affects the function gf_fq_pop of the file filter_cor…
    CVE-2026-108538 (CVSS 2.1) — A security vulnerability has been detected in GPAC up to 26.07.0. The impacted element is the function gf_mx_v…
    CVE-2026-103227 (CVSS 5.3) — A weakness has been identified in GPAC up to 26.07.0. Affected by this issue is the function gf_dash_resolve_u…
    CVE-2026-88339 (CVSS 5.5) — A NULL pointer dereference vulnerability exists in the gf_sg_vrml_field_clone() function of GPAC 2d7da22e (26.…
    CVE-2026-93331 (CVSS 6.9) — A vulnerability was identified in GPAC 26.08-DEV. This vulnerability affects the function gf_rtp_parse_ttxt of…
    CVE-2026-92475 (CVSS 1.9) — A weakness has been identified in GPAC 26.08-DEV. This impacts the function wait_for_header_and_parse of the f…

    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