CVE-2026-107695

high

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.

References

https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-infinite-loop-via-self-referencing-playlist

https://github.com/FFmpeg/FFmpeg/commit/c364ab176f722bdabc886845e770c9eacbc1e3e5

https://github.com/FFmpeg/FFmpeg/commit/a4ddaba8bb78

https://github.com/FFmpeg/FFmpeg/commit/0e6eef35517a

https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L866

https://github.com/FFmpeg/FFmpeg

https://gist.github.com/OxBat/59574a2940092cda1b6e76bbf96f53d0

https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-95123

https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618

Details

Source: Mitre, NVD

Published: 2026-10-08

Updated: 2026-10-08

Risk Information

CVSS v2

Base Score: 7.8

Vector: CVSS2#AV:N/AC:L/Au:N/C:N/I:N/A:C

Severity: High

CVSS v3

Base Score: 6.5

Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

Severity: Medium

CVSS v4

Base Score: 7.1

Vector: 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

Severity: High

EPSS

EPSS: 0.00446