CVE-2026-6752
Boundary Condition Error in Firefox WebRTC Risks Memory Corruption
Publication date: 2026-04-21
Last updated on: 2026-04-22
Assigner: Mozilla Corporation
Description
Description
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | to 150.0 (exc) |
| mozilla | firefox | to 115.35.0 (exc) |
| mozilla | firefox | From 140.0 (inc) to 140.10.0 (exc) |
| mozilla | thunderbird | From 140.0 (inc) to 140.10.0 (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 WebRTC component of Mozilla Firefox. It means that the software did not properly handle certain limits or edges in the WebRTC code, which could potentially lead to unexpected behavior or security issues. The problem was addressed and fixed in Firefox versions 150, Firefox ESR 115.35, and Firefox ESR 140.10.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this vulnerability, update your Firefox browsers to the fixed versions: Firefox 150, Firefox ESR 115.35, or Firefox ESR 140.10.
How can this vulnerability impact me? :
This vulnerability involves incorrect boundary conditions in the WebRTC component of Firefox. Such issues can potentially lead to unexpected behavior or security risks when using WebRTC features in affected Firefox versions prior to the fixes.
The vulnerability was fixed in Firefox 150, Firefox ESR 115.35, and Firefox ESR 140.10, so using these or later versions mitigates the risk.