---
id: "CVE-2026-119843"
kind: "vulnerability"
aliases: ["CVE-2026-119843"]
title: "GStreamer gst-plugins-good: malformed FLV file crashes media-playing applications"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["flv", "gstreamer", "media-processing", "package"]
not_affected_if: ["no-flv-input", "no-gstreamer"]
published_at: "2026-11-03T10:17:16+00:00"
first_seen_at: "2026-11-03T10:20:15+00:00"
updated_at: "2026-11-03T10:20:39+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119843", "first_seen_at": "2026-11-03T10:20:15+00:00"}]
---

# GStreamer gst-plugins-good: malformed FLV file crashes media-playing applications

The FLV demuxer in GStreamer's gst-plugins-good does not validate buffer sizes when parsing enhanced audio and video tags in malformed or truncated FLV files. A remote attacker can supply a crafted FLV file that causes an assertion failure or process crash, denying service to the application playing it.

_Summary, check and fix written by a model from the sources; labelled as such._

## Timeline

- 2026-11-03T10:20:15+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119843

## From the sources

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.

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