CVE-2026-8952
Modified Modified - Updated After Analysis
Privilege Escalation in Firefox Update Component

Publication date: 2026-05-19

Last updated on: 2026-05-20

Assigner: Mozilla Corporation

Description
Privilege escalation in the Application Update component. This vulnerability was fixed in Firefox 151 and Thunderbird 151.
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Meta Information
Published
2026-05-19
Last Modified
2026-05-20
Generated
2026-06-10
AI Q&A
2026-05-19
EPSS Evaluated
2026-06-08
NVD
CVE-2026-8952
EUVD
EUVD-2026-30902
Affected Vendors & Products
Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 151.0.0 (exc)
mozilla thunderbird to 151.0.0 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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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.
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Executive Summary

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.

Impact Analysis

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.

Mitigation Strategies

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.

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