Quick answers
- Is CVE-2026-125041 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-125041 being exploited in the wild.
- How severe is CVE-2026-125041?
- Medium severity, with a CVSS score of 5.5, published 9 November 2026.
- Which products and versions are affected?
- Gstreamer Gst-Plugins-Good before 1.28.3.
- Is there a fix for CVE-2026-125041?
- Yes: fixed in gst-plugins-good 1.28.3. Until then: Avoid processing untrusted MOV/MP4 files with qtdemux; deployments that do not require MOV/MP4 support can disable the isomp4 plugin. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-125041 attacked?
- It is attacked with local access, in a software library.
- Am I affected by CVE-2026-125041?
- Check whether you run Gstreamer Gst-Plugins-Good at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: gst-plugins-good 1.28.3
Avoid processing untrusted MOV/MP4 files with qtdemux; deployments that do not require MOV/MP4 support can disable the isomp4 plugin.
Technical details
The qtdemux demuxer in gst-plugins-good fails to validate row alignment and chroma geometry declarations before constructing video buffer layouts for uncompressed video tracks. A crafted MOV/MP4 file with malformed layout parameters triggers an out-of-bounds heap read during sample copying, potentially crashing the process. Exploitation requires local file access and user interaction to open the malicious media file.
Affected products
- GStreamer gst-plugins-good before 1.28.3
Timeline
- 2026-11-09: disclosed