---
id: CVE-2026-52718
title: >-
  A denial of service vulnerability was found in GStreamer's AV1 codec parser in
  gst-plugins-bad
summary: >-
  A denial of service vulnerability was found in GStreamer's AV1 codec parser in
  gst-plugins-bad. The gst_av1_parser_parse_tile_list_obu() function passes a
  byte count to a bit-reader API that expects a bit count, causing parser
  desynchron…
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'
cwe:
  - CWE-617
published: '2026-06-15'
updated: '2026-07-14'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-52718'
references:
  - url: 'https://access.redhat.com/errata/RHSA-2026:36749'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/errata/RHSA-2026:36834'
    label: secalert@redhat.com
  - url: 'https://access.redhat.com/security/cve/CVE-2026-52718'
    label: secalert@redhat.com
  - url: 'https://bugzilla.redhat.com/show_bug.cgi?id=2486328'
    label: secalert@redhat.com
  - url: 'https://gitlab.freedesktop.org/gstreamer/gstreamer/-/work_items/5103'
    label: secalert@redhat.com
tags:
  - nvd
epss: 0.00709
epssPercentile: 0.51611
ingestedAt: '2026-07-14T09:36:17.959Z'
---

## Overview

A denial of service vulnerability was found in GStreamer's AV1 codec parser in gst-plugins-bad. The gst_av1_parser_parse_tile_list_obu() function passes a byte count to a bit-reader API that expects a bit count, causing parser desynchronization. A remote attacker could trick a user into opening a specially crafted AV1 media file, triggering an assertion abort and causing the application to crash.

## Remediation

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