# CVE-2026-119727: GStreamer gst-plugins-bad H.265 parser buffer overflow

Source: https://junglewise.ai/threats/cve-2026-119727-a-flaw-was-found-in-gstreamer-s-gst-plugins-bad-h-265-video  
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-2026-119727 · Severity: medium · CVSS 6.5 · Published 2026-10-30

GStreamer's video plugin for parsing H.265 video streams contains a flaw that allows a specially crafted video file to crash an application. An attacker can trigger a denial-of-service by providing a malformed H.265 media file that the vulnerable plugin attempts to parse, causing memory corruption and application crash.

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-2026-119727 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119727 being exploited in the wild.

**How severe is CVE-2026-119727?** Medium severity, with a CVSS score of 6.5, published 30 October 2026.

**Which products and versions are affected?** Gstreamer Gst-Plugins-Bad before 1.28.1.

**Is there a fix for CVE-2026-119727?** Yes: fixed in gst-plugins-bad 1.28.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-119727 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-119727?** 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

- Fixed in gst-plugins-bad 1.28.1

## Technical details

An integer underflow in the H.265 Screen Content Coding (SCC) palette predictor initializer bounds computation allows out-of-range values to be accepted, leading to a heap-based buffer overflow when writing palette predictor entries. The vulnerability requires a user to open a crafted H.265 bitstream; exploitation results in application crash (DoS) with no confidentiality or integrity impact.

## Affected products

- GStreamer gst-plugins-bad before 1.28.1

## Timeline

- 2026-10-30: advisory

## References

- [https://access.redhat.com/downloads/content/package-browser/](https://access.redhat.com/downloads/content/package-browser/)
- [https://access.redhat.com/security/cve/CVE-2026-119727](https://access.redhat.com/security/cve/CVE-2026-119727)

## Related threats

- [GStreamer gst-plugins-bad out-of-bounds read in MPEG/DVD parsing](https://junglewise.ai/threats/cve-2026-125706-a-flaw-was-found-in-gstreamer-s-gst-plugins-bad-mpeg-program)
- [GStreamer gst-plugins-bad MXF plugin buffer overflow in VANC handling](https://junglewise.ai/threats/cve-2026-125703-a-flaw-was-found-in-the-gstreamer-gst-plugins-bad-mxf-plugin)
- [GStreamer gst-plugins-bad H.265 uninitialized memory use](https://junglewise.ai/threats/cve-2026-121611-a-flaw-was-found-in-gstreamer-s-gst-plugins-bad-package-a-use-of)
- [GStreamer MXF demuxer out-of-bounds read](https://junglewise.ai/threats/cve-2026-121601-a-flaw-was-found-in-gstreamer-s-mxf-demuxer-plugin-gst-plugins)
- [GStreamer gst-plugins-bad JPEG 2000 decimator integer overflow and division by zero](https://junglewise.ai/threats/cve-2026-121259-a-flaw-was-found-in-the-gstreamer-jpeg-2000-decimator-in-gst)