---
id: CVE-2026-119843
title: >-
  Gst-plugins-good: assertion failures in FLV demuxer when parsing malformed
  enhanced audio/video tags
summary: >-
  A flaw was found in GStreamer's gst-plugins-good package. The FLV media
  demuxer does not properly validate buffer sizes and data availability when
  processing enhanced audio and video tags in malformed or truncated FLV
  streams. A remote a…
severity: medium
cvss: 6.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:N/A:H'
cvssSource: cna
cwe:
  - CWE-617
vendor: Red Hat
product: gstreamer1-plugins-good
affected:
  - gstreamer1-plugins-good
  - gstreamer1-plugins-good
  - gstreamer1-plugins-good
  - gstreamer1-plugins-good
  - gst-plugins-good < 1.28.2
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-11-03T13:18:19.247406Z'
published: '2026-11-03'
updated: '2026-11-03'
sourceUpdated: '2026-11-03T13:20:08.399Z'
source: CVEORG
sourceUrl: 'https://www.cve.org/CVERecord?id=CVE-2026-119843'
references:
  - url: 'https://access.redhat.com/security/cve/CVE-2026-119843'
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2564182'
    label: RHBZ#2564182
  - url: >-
      https://gitlab.freedesktop.org/gstreamer/gstreamer/-/merge_requests/11244.patch
  - url: 'https://gstreamer.freedesktop.org/security/sa-2026-0020.html'
tags:
  - cve.org
epss: 0.00563
epssPercentile: 0.46931
ingestedAt: '2026-11-05T19:30:42.945Z'
---

## Overview

A flaw was found in GStreamer's gst-plugins-good package. The FLV media demuxer does not properly validate buffer sizes and data availability when processing enhanced audio and video tags in malformed or truncated FLV streams. A remote attacker could exploit this vulnerability by providing a specially crafted FLV media file that, when opened or streamed by a GStreamer-based application, triggers an assertion failure or a process crash, leading to denial of service.

## Affected

- `gstreamer1-plugins-good`
- `gstreamer1-plugins-good`
- `gstreamer1-plugins-good`
- `gstreamer1-plugins-good`
- `gst-plugins-good < 1.28.2`

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.

### Workarounds

No mitigation is currently available that meets Red Hat Product Security's standards for usability, deployment, applicability, or stability.