CVE-2026-107695
FFmpeg before 8.1.3 HLS Demuxer Infinite Loop via Self-Referencing Playlist
HIGH 7.1EPSS 0.5%
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.
- Affected
- FFmpeg
- CVSS v4.0 VULNCHECK
- 7.1 HIGH
CVSS: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/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - CVSS v3.1 VULNCHECK
- 6.5 MEDIUM
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H - EPSS
- 0.46% chance of exploitation in the next 30 days, 38th percentile
- Published
- 2026-10-08
- Updated
- 2026-10-14
Proof-of-concept exploits (1)
Security advisories
- https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-infinite-loop-via-se…
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618
- FFmpeg/FFmpeg/commit/0e6eef35517a