CVE-2026-107677
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.
Does this matter?
Lower severity and a low EPSS score (0.14%). Track it; it rarely justifies an emergency change on its own.
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.
- CVSS 4.0
- 5.7 MEDIUMCVSS:4.0/AV:L/AC:H/AT:P/PR:N/UI:P/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/M
- EPSS
- 0.14% probability · 3th percentile
- Public exploits
- None in Exploit-DB
- CISA KEV
- Not listed
- Weakness
- CWE-835
- Affected
- ffmpeg/ffmpeg
- Source
- disclosure@vulncheck.com
EPSS moved from 0.1% on 9 October 2026 to 0.1% on 26 October 2026.
References
- https://code.ffmpeg.org/FFmpeg/FFmpeg/commit/ed27bfcbbbc0872c0195eaf4dd2c0c93b9f1778ePatch
- https://code.ffmpeg.org/FFmpeg/FFmpeg/pulls/24592Issue Tracking, Patch
- https://ffmpeg.org/Product
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavformat/dashdec.c#L1726Product
- https://github.com/FFmpeg/FFmpeg/blob/n9.0.2/libavutil/avstring.c#L230-L238Product
- https://www.vulncheck.com/advisories/ffmpeg-through-9.0.2-dash-demuxer-infinite-loop-via-empty-segmenttemplate-mediaThird Party Advisory
Source: NVD record, EPSS from FIRST.org, KEV from CISA, exploits from Exploit-DB. Refreshed daily. Download this record as JSON.