CVE-2026-107677 FFmpeg through 9.0.2 DASH Demuxer Infinite Loop via Empty SegmentTemplate Media
Attackers can cause a denial of service in FFmpeg by providing a crafted DASH manifest with an empty segment template, leading to an infinite loop.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Local or same network only
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-107677?
CVE-2026-107677 is a medium-severity denial of service vulnerability in Ffmpeg Ffmpeg, published on 8 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.
Official 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.
Weakness: CWE-835
Which versions are affected by CVE-2026-107677?
It affects 1 product.
Products include Ffmpeg Ffmpeg.
How do I fix CVE-2026-107677?
Apply the vendor's patch.
Upgrade, then put limits on request size, rate and nesting depth so one client cannot exhaust the service. More about Denial of service.
Is CVE-2026-107677 being exploited?
There is no known exploitation of CVE-2026-107677 in the wild and no public exploit code.
Other vulnerabilities in Ffmpeg Ffmpeg
Sources
Also known as DEBIAN-CVE-2026-107677, ECHO-7475-7be3-3d40, GHSA-23w5-87r9-849m, UBUNTU-CVE-2026-107677.