CVE-2026-8946
Incorrect Boundary Conditions in Firefox Web Codecs Component
Publication date: 2026-05-19
Last updated on: 2026-05-19
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| 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 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 Powered Q&A
Can you explain this vulnerability to me?
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.
How can this vulnerability impact me? :
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.
What immediate steps should I take to mitigate this vulnerability?
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.