CVE-2026-6761
Privilege Escalation in Firefox Networking Component Fixed in
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 140.10.0 (exc) |
| mozilla | thunderbird | to 140.10.0 (exc) |
Helpful Resources
Exploitability
| CWE ID | Description |
|---|---|
| CWE-269 | The product does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor. |
Attack-Flow Graph
AI Powered Q&A
How can this vulnerability impact me? :
Privilege escalation vulnerabilities can allow attackers to gain unauthorized access or control over parts of the system or application that should be restricted.
In this case, exploiting the vulnerability in the Networking component of Firefox could enable an attacker to perform actions with elevated privileges, potentially compromising the security and integrity of the user's environment.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this privilege escalation vulnerability in the Networking component, you should update your Firefox browser to version 150 or later, or Firefox ESR to version 140.10 or later.
Can you explain this vulnerability to me?
This vulnerability is a privilege escalation issue found in the Networking component of Mozilla Firefox. It allows an attacker to gain higher privileges than intended within the affected software.
The issue was addressed and fixed in Firefox version 150 and Firefox ESR 140.10.