CVE-2026-8968

Analyzed Analyzed - Analysis Complete

Denial-of-Service in Firefox Due to Invalid Pointer in Web Codecs

Publication date: 2026-05-19

Last updated on: 2026-05-20

Assigner: Mozilla Corporation

Description

Denial-of-service due to invalid pointer in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-05-19

Last Modified

2026-05-20

Generated

2026-06-30

AI Q&A

2026-05-19

EPSS Evaluated

2026-06-28

NVD

CVE-2026-8968

EUVD

EUVD-2026-30916

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 151.0.0 (exc)
mozilla	firefox	to 140.11.0 (exc)
mozilla	thunderbird	to 140.11 (exc)
mozilla	thunderbird	to 151.0.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-400	The product does not properly control the allocation and maintenance of a limited resource.

Attack-Flow Graph

Executive Summary

This vulnerability is a denial-of-service issue caused by an invalid pointer in the Audio/Video: Web Codecs component of Mozilla Firefox.

It means that due to improper handling of pointers in this component, an attacker could cause the application to crash or become unresponsive.

The issue was fixed in Firefox version 151 and Firefox ESR 140.11.

Impact Analysis

This vulnerability can impact you by causing denial-of-service conditions in Firefox.

An attacker could exploit the invalid pointer issue to crash the browser or make it unresponsive, disrupting your ability to use it.

Mitigation Strategies

To mitigate this vulnerability, update Firefox to version 151 or later, or Firefox ESR to version 140.11 or later, where the issue has been fixed.

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