# CVE-2026-73473: GStreamer gst-plugins-good avidemux denial of service

Source: https://junglewise.ai/threats/cve-2026-73473-a-flaw-was-found-in-gstreamer-gst-plugins-good-avidemux-in-the  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-73473 · Severity: medium · CVSS 5.5 · Published 2026-11-06

GStreamer is a multimedia framework used by media players and file managers to process audio and video files. A flaw in its AVI file parser allows a crafted AVI file to cause excessive memory allocation, crashing the application and denying users access to the system. The vulnerability is triggered automatically when opening or previewing the malicious file.

Technologies: [Gstreamer Gst-Plugins-Good](https://junglewise.ai/threats/technologies/gstreamer-gst-plugins-good). Vendors: [Gstreamer](https://junglewise.ai/threats/vendors/gstreamer).

## Quick answers

**Is CVE-2026-73473 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-73473 being exploited in the wild.

**How severe is CVE-2026-73473?** Medium severity, with a CVSS score of 5.5, published 6 November 2026.

**Which products and versions are affected?** Gstreamer Gst-Plugins-Good before 1.28.6.

**Is there a fix for CVE-2026-73473?** Yes: fixed in gst-plugins-good 1.28.6. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-73473 attacked?** It is attacked with local access, in a software library.

**Am I affected by CVE-2026-73473?** 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 1.28.6

## Technical details

The avidemux plugin in gst-plugins-good lacks validation of the entry count in the subindex parser, leading to CWE-770 (unthrottled resource allocation). An attacker crafting a malicious AVI file can trigger unbounded memory allocation via the subindex structure. Because avidemux is auto-plugged by playbin, decodebin, and gst-discoverer, no user interaction beyond opening or previewing the file is required; the vulnerability is exploited at parse time.

## Affected products

- GStreamer gst-plugins-good before 1.28.6

## Timeline

- 2026-11-06: advisory

## References

- [https://gitlab.freedesktop.org/gstreamer/gst-plugins-good](https://gitlab.freedesktop.org/gstreamer/gst-plugins-good)
- [https://access.redhat.com/security/cve/CVE-2026-73473](https://access.redhat.com/security/cve/CVE-2026-73473)

## Related threats

- [GStreamer gst-plugins-good out-of-bounds heap read in qtdemux](https://junglewise.ai/threats/cve-2026-125041-a-flaw-was-found-in-gstreamer-s-gst-plugins-good-mov-mp4-demuxer)
- [GStreamer gst-plugins-good H.264 RTP depayloader heap read overflow](https://junglewise.ai/threats/cve-2026-119610-a-flaw-was-found-in-gstreamer-s-gst-plugins-good-specifically-in)
- [GStreamer adaptive streaming demuxers local file disclosure via unvalidated URIs](https://junglewise.ai/threats/cve-2026-121629-a-flaw-was-found-in-gstreamer-s-adaptive-streaming-demuxers-hls)
- [GStreamer gst-plugins-good integer overflow in AVI parser](https://junglewise.ai/threats/cve-2026-73472-a-flaw-was-found-in-gstreamer-gst-plugins-good-avidemux-in-the)
- [GStreamer gst-plugins-good out-of-bounds read in Nikon metadata parser](https://junglewise.ai/threats/cve-2026-73471-a-flaw-was-found-in-gstreamer-gst-plugins-good-avidemux-in-the)