CVE-2026-107695
FFmpeg before 8.1.3 contains an infinite loop vulnerability in the HLS demuxer that allows remote attackers to cause denial of service because parse_playlist() accepts Master Playlist tags inside Media Playlists.
Does this matter?
High impact if exploited, but EPSS currently rates exploitation as unlikely (0.47%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit.
Description
FFmpeg before 8.1.3 contains an infinite loop vulnerability in the HLS demuxer that allows remote attackers to cause denial of service because parse_playlist() accepts Master Playlist tags inside Media Playlists. Attackers can trick victims into opening a crafted self-referencing playlist that endlessly adds variants in hls_read_header(), causing unbounded CPU and I/O consumption.
- CVSS 4.0
- 7.1 HIGHCVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.47% probability · 40th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- ffmpeg/ffmpeg
- Source
- disclosure@vulncheck.com
EPSS moved from 0.4% on 9 October 2026 to 0.5% on 26 October 2026.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618Issue Tracking, Patch
- https://gist.github.com/OxBat/59574a2940092cda1b6e76bbf96f53d0Exploit, Mitigation, Third Party Advisory
- https://github.com/FFmpeg/FFmpegProduct
- https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L866Product
- https://github.com/FFmpeg/FFmpeg/commit/0e6eef35517aPatch
- https://github.com/FFmpeg/FFmpeg/commit/a4ddaba8bb78Patch
- https://github.com/FFmpeg/FFmpeg/commit/c364ab176f722bdabc886845e770c9eacbc1e3e5Patch
- https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-infinite-loop-via-self-referencing-playlistPatch, Third Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.