CVE-2026-107697: ffmpeg — Fix

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.

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CVSS v3.1 Score

4.3

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:N/A:N

EPSS — Exploit Prediction

0.0032

Probability of exploitation

0.24%

Percentile rank

EPSS estimates the probability that this vulnerability will be exploited in the wild within the next 30 days. A higher score means more likely to be exploited.

Weakness Type (CWE)

CWE-693 CWE-693

Affected Products

Vendor	Product	Versions
ffmpeg	ffmpeg	< 8.1.3

References

Advisories & Patches

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

Other References

https://github.com/FFmpeg/FFmpeg https://github.com/FFmpeg/FFmpeg/blob/n8.1.2/libavformat/hls.c#L834

Frequently Asked Questions

What is 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. It has a CVSS v3.1 base score of 4.3 (MEDIUM).

How severe is CVE-2026-107697? +

CVE-2026-107697 has a CVSS v3.1 score of 4.3 out of 10, rated MEDIUM. This is a medium-severity vulnerability that should be remediated as part of regular maintenance. The EPSS score is 0.0032, placing it in the 0th percentile for exploitation probability.

What products are affected by CVE-2026-107697? +

CVE-2026-107697 affects products from ffmpeg, specifically: ffmpeg. Check the affected products table above for specific version ranges.

How do I check if I'm vulnerable to CVE-2026-107697? +

You can use Secably's free Website Scanner to check your website for known vulnerabilities. For infrastructure scanning, use the Port Scanner to identify exposed services that may be affected. Check the vendor advisories linked above for specific patch and version information.

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CVE-2026-107697