CVE-2026-2803
Received Received - Intake

Information Disclosure and Mitigation Bypass in Firefox Settings UI

Publication date: 2026-02-24

Last updated on: 2026-04-13

Assigner: Mozilla Corporation

Description
Information disclosure, mitigation bypass in the Settings UI component. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

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Meta Information

Published
2026-02-24
Last Modified
2026-04-13
Generated
2026-07-06
AI Q&A
2026-02-24
EPSS Evaluated
2026-07-05
NVD
CVE-2026-2803
EUVD
EUVD-2026-8456

Affected Vendors & Products

Showing 2 associated CPEs
Vendor Product Version / Range
mozilla firefox to 148.0 (exc)
mozilla thunderbird to 148.0 (exc)

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-200 The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.
CWE-693 The product does not use or incorrectly uses a protection mechanism that provides sufficient defense against directed attacks against the product.

Attack-Flow Graph

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Executive Summary

This vulnerability is an information disclosure and mitigation bypass issue in the Settings UI component of Firefox versions prior to 148.

Impact Analysis

The vulnerability could lead to unauthorized disclosure of information due to a bypass of mitigation controls in the Settings UI component, potentially exposing sensitive data to attackers.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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