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. Attackers can supply a crafted master playlist whose child playlists use disallowed protocols or non-multimedia local files, making parse_playlist() open resources the HLS security policy should block.
Fix
Patch, vendor advisory and mitigation references on NVD 4
- https://github.com/FFmpeg/FFmpeg/commit/01044d04536e Patch
- https://github.com/FFmpeg/FFmpeg/commit/191715f0232c Patch
- https://github.com/FFmpeg/FFmpeg/commit/23602df9cd1b485c45ba6f533d3b85569de3f323 Patch
- https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-security-check-bypass-via-parse-playlist Patch, Third Party Advisory
Every line above is quoted from NVD, CISA, Microsoft, the vendor's own advisory or DISA; nothing is generated.
Change history 1
- First seenCVSS 5.3 · ffmpegNVD modified 2026-10-15 00:01
Affected (CPE criteria) 1
cpe:2.3:a:ffmpeg:ffmpeg:*:*:*:*:*:*:*:*
References 6
- https://github.com/FFmpeg/FFmpeg Product
- https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L834 Product
- https://github.com/FFmpeg/FFmpeg/commit/01044d04536e Patch
- https://github.com/FFmpeg/FFmpeg/commit/191715f0232c Patch
- https://github.com/FFmpeg/FFmpeg/commit/23602df9cd1b485c45ba6f533d3b85569de3f323 Patch
- https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-security-check-bypass-via-parse-playlist Patch, Third Party Advisory