---
id: CVE-2026-107697
title: >-
  FFmpeg before 8.1.3 contains a protection mechanism failure in the HLS demuxer
  that allows attackers to bypass protocol and allowed_extensions restrictions
  when opening child playlists
summary: >-
  FFmpeg before 8.1.3 contains a protection mechanism failure in the HLS demuxer
  that allows attackers to bypass protocol and allowed_extensions restrictions
  when opening child playlists. Attackers can supply a crafted master playlist
  whos…
severity: medium
cvss: 4.3
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N'
cwe:
  - CWE-693
vendor: ffmpeg
product: ffmpeg
affected:
  - ffmpeg < 8.1.3
patched:
  - ffmpeg 8.1.3
published: '2026-10-08'
updated: '2026-10-15'
sourceUpdated: '2026-10-15T00:01:45.480'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107697'
references:
  - url: 'https://github.com/FFmpeg/FFmpeg'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L834'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FFmpeg/FFmpeg/commit/01044d04536e'
    label: disclosure@vulncheck.com
  - url: 'https://github.com/FFmpeg/FFmpeg/commit/191715f0232c'
    label: disclosure@vulncheck.com
  - url: >-
      https://github.com/FFmpeg/FFmpeg/commit/23602df9cd1b485c45ba6f533d3b85569de3f323
    label: disclosure@vulncheck.com
  - url: >-
      https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-security-check-bypass-via-parse-playlist
    label: disclosure@vulncheck.com
tags:
  - nvd
  - cve.org
epss: 0.00319
epssPercentile: 0.24774
ingestedAt: '2026-10-08T17:56:11.735Z'
ssvc:
  exploitation: none
  automatable: 'yes'
  technicalImpact: partial
  timestamp: '2026-10-14T14:53:30.618812Z'
---

## Overview

FFmpeg before 8.1.3 contains a protection mechanism failure in the HLS demuxer that allows attackers to bypass protocol and allowed_extensions restrictions when opening child playlists. Attackers can supply a crafted master playlist whose child playlists use disallowed protocols or non-multimedia local files, making parse_playlist() open resources the HLS security policy should block.

## Affected

- `ffmpeg < 8.1.3`

## Remediation

Upgrade past the affected range:

- `ffmpeg 8.1.3`