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    CVE-2026-107676

    FFmpeg through 9.0.2 contains an uninitialized memory disclosure vulnerability in av_dynamic_hdr_plus_to_t35() that leaves up to three payload bytes uninitialized when tone_mapping_flag is 0. Attackers can supply crafted Matroska T.35 BlockAdditional or HEVC/AV1 SEI metadata so that remuxing or transcoding writes leaked process memory into output files.

    Published:Oct 8, 2026
    Last Modified:Oct 14, 2026
    EPS:Oct 8, 2026
    EPSS Score:0.00119
    CVSS Score:3.3

    Affected Products

    Vendor
    Ffmpeg
    Product
    Ffmpeg

    Exploits

    No exploit reference

    Common Weakness Enumeration

    CWE-908 Use of Uninitialized Resource

    Common Attack Pattern Enumeration and Classification (CAPEC)

    No CAPEC recorded yet

    Related CVEs

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    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…
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    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…
    CVE-2026-107678 (CVSS 5.7) — FFmpeg through 9.0.2 contains a stack exhaustion vulnerability in av_encryption_init_info_free() in libavutil/…
    CVE-2026-107677 (CVSS 5.7) — FFmpeg through 9.0.2 contains a denial of service vulnerability in the DASH demuxer that allows attackers to t…
    CVE-2026-107675 (CVSS 6) — FFmpeg through 9.0.2 contains a missing host key verification vulnerability in the libssh-based sftp protocol …
    CVE-2026-107660 (CVSS 6.3) — FFmpeg before 8.1.3 and 9.x before 9.0.2 contains an improper certificate validation vulnerability in tls_open…
    CVE-2026-96611 (CVSS 6.9) — FFmpeg before 9.0 has a signed integer overflow in libavformat/mov.c. In mov_read_ispe(), uint32_t width/heigh…

    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