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CVE-2026-107697 FFmpeg CVE debrief

AI-assisted PatchSiren debrief based on the supplied source corpus. The CVE record was published on 2026-10-08T17:30:28.094Z and has not been modified since then. The vulnerability affects FFmpeg installations using HLS demuxer, allowing attackers to bypass security restrictions. Defenders should assess exposure and prioritize verification and remediation. The HLS demuxer security check bypass occurs via parse_playlist(), impacting FFmpeg versions before 8.1.3. This protection mechanism failure enables attackers to open resources that should be blocked by the HLS security policy.

Vendor
FFmpeg
Product
Unknown
CVSS
MEDIUM 5.3
CISA KEV
Not listed in stored evidence
Original CVE published
2026-10-08
Original CVE updated
2026-10-08
Advisory published
2026-10-08
Advisory updated
2026-10-08

Who should care

Defenders responsible for FFmpeg installations, particularly those using HLS demuxer, should assess exposure and prioritize verification and remediation. This includes reviewing HLS demuxer configurations, monitoring for suspicious playlist activity, and implementing additional security measures to detect and prevent potential attacks. Operators, platform administrators, vulnerability management teams, and security teams should be aware of the potential by

Why it matters

Defenders should prioritize verifying FFmpeg versions and updating to 8.1.3 or later, reviewing HLS demuxer configurations, and monitoring for suspicious playlist activity due to the protection mechanism failure in the HLS demuxer of FFmpeg before 8.1.3.

  • Potential bypass of security restrictions in HLS demuxer
  • Possible exposure to disallowed protocols or non-multimedia local files
  • Verification of FFmpeg versions and HLS demuxer configurations required
  • Monitoring for suspicious playlist activity recommended

Technical summary

FFmpeg before 8.1.3 contains a protection mechanism failure in the HLS demuxer that allows attackers to bypass protocol and allowed_extensions restrictions when opening child playlists. This vulnerability impacts FFmpeg installations using the HLS demuxer, enabling attackers to supply crafted master playlists that use disallowed protocols or non-multimedia local files. The parse_playlist() function fails to enforce security policies, allowing the opening of resources that should be blocked. Defenders should prioritize verifying FFmpeg versions and updating to 8.1.3 or later, reviewing HLS demuxer configurations, and monitoring for suspicious playlist activity.

Defensive priority

Defenders should prioritize verifying FFmpeg versions and updating to 8.1.3 or later, reviewing HLS demuxer configurations, and monitoring for suspicious playlist activity.

Recommended defensive actions

  • Verify FFmpeg versions and update to 8.1.3 or later
  • Review HLS demuxer configurations to ensure proper restrictions
  • Monitor for suspicious playlist activity
  • Implement additional security measures to detect and prevent potential attacks
  • Conduct a thorough review of the FFmpeg HLS demuxer configuration
  • Perform vulnerability scanning to identify exposed systems
  • Develop and implement compensating controls for exposed systems

Evidence notes

The CVE record and source item provide details on the protection mechanism failure in the HLS demuxer of FFmpeg before 8.1.3, which allows attackers to bypass protocol and allowed_extensions restrictions when opening child playlists.

Sources and references

Verified primary and authoritative sources

  • CVE-2026-107697 CVE Program record

    Publisher, destination, and source semantics verified

    URL: https://www.cve.org/CVERecord?id=CVE-2026-107697

    CVE Program - Official CVE Program record with source-provided CVE metadata.

  • CVE-2026-107697 NVD vulnerability detail

    Publisher, destination, and source semantics verified

    URL: https://nvd.nist.gov/vuln/detail/CVE-2026-107697

    NIST National Vulnerability Database - Official NIST NVD detail page and source-specific vulnerability assessment.

Supplemental references

  • FFmpeg before 8.1.3 HLS Demuxer Security Check Bypass via parse_playlist()

    Unverified legacy reference

    URL: https://raw.githubusercontent.com/CVEProject/cvelistV5/main/cves/2026/107xxx/CVE-2026-107697.json

    cve_program_cvelist_v5

  • Source reference

    Unverified legacy reference

    URL: https://github.com/FFmpeg/FFmpeg/commit/23602df9cd1b485c45ba6f533d3b85569de3f323

    Supplemental source - patch

  • Source reference

    Unverified legacy reference

    URL: https://github.com/FFmpeg/FFmpeg/commit/01044d04536e

    Supplemental source - patch

  • Source reference

    Unverified legacy reference

    URL: https://github.com/FFmpeg/FFmpeg/commit/191715f0232c

    Supplemental source - patch

  • Source reference

    Unverified legacy reference

    URL: https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c

    Supplemental source - technical-description

  • Source reference

    Unverified legacy reference

    URL: https://github.com/FFmpeg/FFmpeg

    Supplemental source - product

  • Source reference

    Unverified legacy reference

    URL: https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-security-check-bypass-via-parse-playlist

    Supplemental source - third-party-advisory

Methodology and review provenance

AI-assisted synthesis based on stored public vulnerability evidence. System validation, approval state, and publication status do not by themselves establish human review of this revision. PatchSiren helps prioritize defensive review and does not prove exposure or remediation on any system.