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    CVE-2026-120246

    FFmpeg 4.4 through 9.0.2 contains a use of uninitialized variable vulnerability in the CDXL decoder that leaks stack memory into decoded pixels via unfilled HAM palette entries. Attackers can craft a type-0 CDXL file whose HAM pixels select unfilled new_palette entries in cdxl_decode_ham8() or cdxl_decode_ham6(), exposing stack bytes and pointer fragments in the BGR24 output.

    Published:Nov 1, 2026
    Last Modified:Nov 1, 2026
    EPS:Nov 1, 2026
    EPSS Score:
    CVSS Score:5.5

    Affected Products

    Vendor
    Ffmpeg
    Product
    Ffmpeg

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-457 Use of Uninitialized Variable

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

    CVE-2026-120247 (CVSS 6.8) — FFmpeg 2.3 through 9.0.2 contains a use of uninitialized resource vulnerability in the Huffyuv decoder that al…
    CVE-2026-120245 (CVSS 6.8) — FFmpeg 0.10 through 9.0.2 contains a use of uninitialized resource vulnerability in sunrast_decode_frame() tha…
    CVE-2026-120244 (CVSS 6.8) — FFmpeg 2.1 through 9.0.2 contains a use of uninitialized resource vulnerability in the PCX decoder that allows…
    CVE-2026-120243 (CVSS 6.8) — FFmpeg 2.0 through 9.0.2 contains a use of uninitialized variable vulnerability in the Go2Meeting decoder that…
    CVE-2026-120210 (CVSS 5.3) — FFmpeg 5.0 through 9.0.2 contains a path traversal vulnerability in the IMF demuxer that allows attackers to o…
    CVE-2025-52290 (CVSS 7.5) — A NULL pointer dereference in the avpriv_h264_has_num_reorder_frames function of Ffmpeg version N-119856-gbe46…
    CVE-2026-107698 (CVSS 5.3) — FFmpeg before 7.1.4 and 8.0.x before 8.0.2 contains a server-side request forgery vulnerability in ff_rtsp_con…
    CVE-2026-107697 (CVSS 5.3) — FFmpeg before 8.1.3 contains a protection mechanism failure in the HLS demuxer that allows attackers to bypass…
    CVE-2026-107696 (CVSS 7.1) — FFmpeg through 9.0.2 contains an infinite loop vulnerability in ff_rtsp_connect() in libavformat/rtsp.c that f…
    CVE-2026-107695 (CVSS 7.1) — FFmpeg before 8.1.3 contains an infinite loop vulnerability in the HLS demuxer that allows remote attackers to…

    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
    CVE-2026-120246 — Ffmpeg (Medium 6.8) | CVE-DB