CVE-2026-107677
FFmpeg through 9.0.2 DASH Demuxer Infinite Loop via Empty SegmentTemplate Media
- State
- Published
- Severity
- 5.7 Medium
- Published
- Oct 8, 2026
- Updated
- Oct 8, 2026
- Reserved
- Oct 8, 2026
Description
FFmpeg through 9.0.2 contains a denial of service vulnerability in the DASH demuxer that allows attackers to trigger an infinite loop by supplying an empty SegmentTemplate media URL. Attackers can craft an .mpd manifest declaring SegmentTemplate media="" so get_current_fragment() calls av_strireplace() with an empty search string, consuming CPU indefinitely.
Scores
| CVSS | Score | Vector | Source |
|---|---|---|---|
| 4.0 | 5.7 Medium | CVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N | VulnCheck |
| 3.1 | 4.7 Medium | CVSS:3.1/AV:L/AC:H/PR:N/UI:R/S:U/C:N/I:N/A:H | VulnCheck |
Weaknesses
- CWE-835 Loop with Unreachable Exit Condition ('Infinite Loop')
Affected Products
| Product | Versions |
|---|---|
FFmpegFFmpeg |
|
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24592patch
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/ed27bfcbbbc0872c0195eaf4dd2c0c93b9f1778epatch
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/avstring.c#L230-L238technical-description
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavformat/dashdec.c#L1726technical-description
- https://ffmpeg.org/product
- VulnCheck Advisory: FFmpeg through 9.0.2 DASH Demuxer Infinite Loop via Empty SegmentTemplate Mediathird-party-advisory
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