# CVE-2026-119842: GStreamer gst-plugins-base NULL pointer dereference in MicroDVD parser

Source: https://junglewise.ai/threats/cve-2026-119842-a-flaw-was-found-in-gstreamer-s-gst-plugins-base-microdvd  
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-2026-119842 · Severity: medium · CVSS 6.5 · Published 2026-10-30

GStreamer is a multimedia framework used by many applications to play audio and video. A flaw in its MicroDVD subtitle parser can crash the media player when processing a malformed subtitle file. An attacker can exploit this by distributing a malicious subtitle file that causes denial of service when opened.

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

## Quick answers

**Is CVE-2026-119842 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-119842 being exploited in the wild.

**How severe is CVE-2026-119842?** Medium severity, with a CVSS score of 6.5, published 30 October 2026.

**Which products and versions are affected?** Gstreamer Gst-Plugins-Base prior to 1.28.2.

**Is there a fix for CVE-2026-119842?** Yes: fixed in gst-plugins-base 1.28.2. Until then: Avoid untrusted MicroDVD (.sub) subtitle files; disable automatic subtitle loading if supported by your application. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-119842 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-119842?** Check whether you run Gstreamer Gst-Plugins-Base 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-base 1.28.2

Avoid untrusted MicroDVD (.sub) subtitle files; disable automatic subtitle loading if supported by your application.

## Technical details

A NULL pointer dereference in the MicroDVD subtitle parser of gst-plugins-base occurs when processing specially crafted .sub files with a missing closing-brace check. The vulnerability requires user interaction to open or play media with the malformed subtitle file, resulting in application crash (denial of service). The upstream fix is available in gst-plugins-base version 1.28.2 and later.

## Affected products

- GStreamer gst-plugins-base prior to 1.28.2

## 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-2026-119842](https://access.redhat.com/security/cve/CVE-2026-119842)

## Related threats

- [GStreamer gst-plugins-base RTCP SDES packet parser buffer over-read](https://junglewise.ai/threats/cve-2026-125712-a-flaw-was-found-in-gstreamer-s-gst-plugins-base-rtcp-sdes)
- [GStreamer gst-plugins-base quadratic regex in SRT/WebVTT parser](https://junglewise.ai/threats/cve-2026-125040-a-flaw-was-found-in-the-srt-and-webvtt-subtitle-parser-in)
- [GStreamer gst-plugins-base heap buffer overflow in GstVideoMeta](https://junglewise.ai/threats/cve-2026-86476-a-flaw-was-found-in-gst-plugins-base-a-heap-buffer-overflow-can)