# CVE-2026-119777: GStreamer gst-plugins-bad H.266/VVC parser integer overflow

Source: https://junglewise.ai/threats/cve-2026-119777-a-flaw-was-found-in-gstreamer-s-gst-plugins-bad-h-266-vvc-parser  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-30. Updated: 2026-10-30  
License: CC BY 4.0 with a link back

CVE-2026-119777 · Severity: high · CVSS 7.8 · Published 2026-10-30

GStreamer is an open-source multimedia framework used by applications to process audio and video files. A flaw in its H.266/VVC video parser can cause a crash or allow code execution when processing a malformed video file. An attacker could trick a user into opening a crafted video file to compromise their system or media processing service.

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

## Quick answers

**Is CVE-2026-119777 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119777 being exploited in the wild.

**How severe is CVE-2026-119777?** High severity, with a CVSS score of 7.8, published 30 October 2026.

**Which products and versions are affected?** Gstreamer Gst-Plugins-Bad versions before fix; RHEL 10.2.z, 10.3.z, 10.4; Fedora 43.

**Is there a fix for CVE-2026-119777?** No fixed version is recorded yet. Disable H.266/VVC media ingestion in GStreamer-based applications and media pipelines where that feature is not required. Do not open or transcode H.266/VVC files or streams from untrusted sources until a patch is available. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-119777 attacked?** It is attacked with local access.

**Am I affected by CVE-2026-119777?** Check whether you run Gstreamer Gst-Plugins-Bad 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


Disable H.266/VVC media ingestion in GStreamer-based applications and media pipelines where that feature is not required. Do not open or transcode H.266/VVC files or streams from untrusted sources until a patch is available.

## Technical details

An integer overflow in the H.266/VVC parser's profile, tier, and level field parsing leads to a stack-based buffer overflow. Attack requires a GStreamer-based application to process attacker-controlled H.266/VVC media with user interaction; exploitation can crash the application or execute code in its context. The vulnerability affects gstreamer1-plugins-bad-free in RHEL 10.2.z, 10.3.z, 10.4 and Fedora 43, but not RHEL 7–10.0.

## Affected products

- GStreamer gst-plugins-bad versions before fix; RHEL 10.2.z, 10.3.z, 10.4; Fedora 43

## Timeline

- 2026-10-30: disclosed

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-119777](https://access.redhat.com/security/cve/CVE-2026-119777)

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