CVE-2026-4700
Received
Received - Intake
Mitigation Bypass in Firefox HTTP Networking Component
Publication date: 2026-03-24
Last updated on: 2026-04-13
Assigner: Mozilla Corporation
Description
Description
Mitigation bypass in the Networking: HTTP 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-288 | The product requires authentication, but the product has an alternate path or channel that does not require authentication. |
Attack-Flow Graph
AI Powered Q&A
Can you explain this vulnerability to me?
This vulnerability is a mitigation bypass in the Networking: HTTP component of Firefox. It affects versions of Firefox earlier than 149 and Firefox ESR earlier than 140.9.
How can this vulnerability impact me? :
Exploitation of this vulnerability could allow an attacker to bypass security mitigations related to the HTTP networking component in affected Firefox versions, potentially leading to unauthorized actions or exposure to further attacks.
How does this vulnerability affect compliance with common standards and regulations (like GDPR, HIPAA)?:
I don't know
How can this vulnerability be detected on my network or system? Can you suggest some commands?
I don't know
What immediate steps should I take to mitigate this vulnerability?
I don't know
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