What’s Vulnerable › Vulnerabilities

CVE-2026-107697: FFmpeg before 8.1.3 HLS Demuxer Security Check Bypass via parse_playlist()

• Severity: medium (CVSS 4.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.3% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-10-08 · updated 2026-10-15
• Weakness: CWE-693

Description

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 products

• FFmpeg: before 8.1.3 — fixed in 8.1.3

How to fix

Upgrade to a fixed version: FFmpeg 8.1.3. Check the vendor advisory for mitigations.

References

• https://github.com/FFmpeg/FFmpeg
• https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L834
• https://github.com/FFmpeg/FFmpeg/commit/01044d04536e
• https://github.com/FFmpeg/FFmpeg/commit/191715f0232c
• https://github.com/FFmpeg/FFmpeg/commit/23602df9cd1b485c45ba6f533d3b85569de3f323
• https://www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-security-check-bypass-via-parse-playlist

Get alerted when CVE-2026-107697 or the next vulnerability affects your stack