CVE-2026-8952
Privilege Escalation in Firefox Update Component
Publication date: 2026-05-19
Last updated on: 2026-05-20
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 151.0.0 (exc) |
| mozilla | thunderbird | to 151.0.0 (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
Can you explain this vulnerability to me?
This vulnerability is a privilege escalation issue found in the Application Update component of Firefox. It allows an attacker to gain higher privileges than intended within the application. The issue was addressed and fixed in Firefox version 151.
How can this vulnerability impact me? :
An attacker exploiting this vulnerability could gain elevated privileges within the Firefox application, potentially allowing them to perform unauthorized actions or access restricted areas of the system that are normally protected.
What immediate steps should I take to mitigate this vulnerability?
To mitigate this privilege escalation vulnerability in the Application Update component, you should update Firefox to version 151 or later where the issue is fixed.