What is CVE-2026-107697?

CVE-2026-107697 is a medium-severity vulnerability in Ffmpeg, classified under Protection Mechanism Failure. CVSS score: 4.3/10. Published 2026-10-08.

How severe is CVE-2026-107697?

Medium severity. CVSS v3 base score is 4.3 out of 10.

Vulnerability in Ffmpeg

CVE-2026-107697

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.

Published 2026-10-08.

CVSS v3 metric

CVSS v3 base score 4.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N.

EPSS exploit prediction

No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.

Affected products

Ffmpeg

Weakness classification (CWE)

CWE-693 — Protection Mechanism Failure

References

github.com/FFmpeg/FFmpeg/commit/23602df9cd1b485c45ba6f533d3b85569de3f323 (patch)
github.com/FFmpeg/FFmpeg/commit/01044d04536e (patch)
github.com/FFmpeg/FFmpeg/commit/191715f0232c (patch)
github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c (technical-description)
github.com/FFmpeg/FFmpeg (product)
www.vulncheck.com/advisories/ffmpeg-before-8.1.3-hls-demuxer-security-check-byp… (third-party-advisory)

Frequently asked questions

What is CVE-2026-107697?: CVE-2026-107697 is a medium-severity vulnerability in Ffmpeg, classified under Protection Mechanism Failure. CVSS score: 4.3/10. Published 2026-10-08.
How severe is CVE-2026-107697?: Medium severity. CVSS v3 base score is 4.3 out of 10.