---
id: "CVE-2026-119729"
kind: "vulnerability"
aliases: ["CVE-2026-119729"]
title: "GStreamer: malformed AV1 stream integer overflow crashes media applications"
severity: "medium"
cvss: 6.5
epss: null
exploited: false
status: "open"
category: "runtime"
products: []
ecosystems: []
tags: ["av1", "gstreamer", "media-processing", "runtime"]
not_affected_if: ["no-av1-content", "trusted-input-only"]
published_at: "2026-10-30T19:18:21+00:00"
first_seen_at: "2026-10-30T19:25:29+00:00"
updated_at: "2026-10-30T19:26:18+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-119729", "first_seen_at": "2026-10-30T19:25:29+00:00"}]
---

# GStreamer: malformed AV1 stream integer overflow crashes media applications

GStreamer's AV1 LEB128 length parser has an integer overflow that a malformed AV1 bitstream can trigger. An attacker can crash any application that processes that media, causing denial of service.

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

## Timeline

- 2026-10-30T19:25:29+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-119729

## From the sources

A flaw was found in GStreamer. An integer overflow vulnerability in the AV1 LEB128 variable-length integer parser allows a remote attacker to cause a crash in applications that process AV1 media content. By crafting a malformed AV1 bitstream containing an invalid LEB128-encoded value, an attacker can cause integer overflow in the parser, resulting in incorrect length values being used during stream processing, which can lead to a denial of service.

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