CVE-2026-107697
FFmpeg before 8.1.3 HLS Demuxer Security Check Bypass via parse_playlist()
- State
- Published
- Severity
- 5.3 Medium
- Published
- Oct 8, 2026
- Updated
- Oct 14, 2026
- Reserved
- Oct 8, 2026
Description
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.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.3 Medium | CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.3 Medium | CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N | VulnCheck |
Weaknesses
- CWE-693 Protection Mechanism Failure
Affected Products
| Product | Versions |
|---|---|
FFmpegFFmpeg |
|
References
- Patch Commitpatch
- Backport to release/9.0patch
- Backport to release/8.1patch
- https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L834technical-description
- https://github.com/FFmpeg/FFmpegproduct
- VulnCheck Advisory: FFmpeg before 8.1.3 HLS Demuxer Security Check Bypass via parse_playlist()third-party-advisory
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