CVE-2026-4705
Received
Received - Intake
Undefined Behavior in Firefox WebRTC Signaling Component
Publication date: 2026-03-24
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
Description
Undefined behavior in the WebRTC: Signaling component. This vulnerability was fixed in Firefox 149, Firefox ESR 140.9, Thunderbird 149, and Thunderbird 140.9.
CVSS Scores
EPSS Scores
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Meta Information
Affected Vendors & Products
| Vendor | Product | Version / Range |
|---|---|---|
| mozilla | firefox | to 149.0 (exc) |
| mozilla | firefox | to 140.9.0 (exc) |
Helpful Resources
Exploitability
CWE
KEV
| CWE ID | Description |
|---|---|
| CWE-758 | The product uses an API function, data structure, or other entity in a way that relies on properties that are not always guaranteed to hold for that entity. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability involves undefined behavior in the WebRTC signaling component of Firefox browsers. It affects versions of Firefox earlier than 149 and Firefox ESR earlier than 140.9.
How can this vulnerability impact me? :
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How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
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How can this vulnerability be detected on my network or system? Can you suggest some commands?
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