CVE-2026-8946
Analyzed Analyzed - Analysis Complete

Incorrect Boundary Conditions in Firefox Web Codecs Component

Publication date: 2026-05-19

Last updated on: 2026-05-19

Assigner: Mozilla Corporation

Description
Incorrect boundary conditions in the Audio/Video: Web Codecs component. This vulnerability was fixed in Firefox 151, Firefox ESR 115.36, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-05-19
Last Modified
2026-05-19
Generated
2026-06-30
AI Q&A
2026-05-19
EPSS Evaluated
2026-06-28
NVD
CVE-2026-8946
EUVD
EUVD-2026-30894

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox From 140.0 (inc) to 140.11.0 (exc)
mozilla firefox to 151.0.0 (exc)
mozilla firefox to 115.36.0 (exc)
mozilla thunderbird to 140.11 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-119 The product performs operations on a memory buffer, but it reads from or writes to a memory location outside the buffer's intended boundary. This may result in read or write operations on unexpected memory locations that could be linked to other variables, data structures, or internal program data.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

This vulnerability involves incorrect boundary conditions in the Audio/Video: Web Codecs component of Mozilla Firefox. Essentially, the way the software handles certain limits or edges in processing audio and video data was flawed, which could lead to unexpected behavior or security issues.

Impact Analysis

The vulnerability could potentially allow an attacker to exploit the incorrect boundary conditions in the Web Codecs component, which might lead to security risks such as crashes, data corruption, or other unintended behavior when processing audio or video content.

Mitigation Strategies

To mitigate this vulnerability, update your Firefox browsers to version 151, Firefox ESR 115.36, or Firefox ESR 140.11 or later, where the issue has been fixed.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-8946. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart