Vulnerability · Published Oct 8, 2026 · Assigned by VulnCheck

CVE-2026-107695FFmpeg before 8.1.3 HLS Demuxer Infinite Loop via Self-Referencing Playlist

Medium 6.5

In plain English

A medium-severity infinite loop in FFmpeg from FFmpeg. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 41% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)6.5Medium

Exploit odds (30 days)0.5%top 59.4% of all CVEs

Exploited in the wildNo reportsCISA SSVC: poc

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
Debian:12	ffmpeg	no fix listed	DEBIAN-CVE-2026-107695
Debian:13	ffmpeg	no fix listed	DEBIAN-CVE-2026-107695
Debian:14	ffmpeg	7:9.0.2-1	DEBIAN-CVE-2026-107695
Ubuntu:26.10	ffmpeg	no fix listed	UBUNTU-CVE-2026-107695

Affected products (as reported)

Vendor	Product	Versions
FFmpeg	FFmpeg	0 – before 8.1.3

Weakness: CWE-835 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H

References

Patch Commit patch
Backport to release/9.0 patch
Backport to release/8.1 patch
https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618 patch
https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L866 technical-description
https://gist.github.com/OxBat/59574a2940092cda1b6e76bbf96f53d0 exploit
https://github.com/FFmpeg/FFmpeg product
VulnCheck Advisory: FFmpeg before 8.1.3 HLS Demuxer Infinite Loop via Self-Referencing Playlist third-party-advisory