CVE-2026-74979
Received Received - Intake

Mitigation Bypass in Firefox Add-ons Manager

Publication date: 2026-08-18

Last updated on: 2026-08-18

Assigner: Mozilla Corporation

Description
Mitigation bypass in the Add-ons Manager component. This vulnerability was fixed in Firefox 154 and Firefox ESR 153.1.

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Meta Information

Published
2026-08-18
Last Modified
2026-08-18
Generated
2026-08-18
AI Q&A
2026-08-18
EPSS Evaluated
N/A
NVD
CVE-2026-74979
EUVD
EUVD-2026-60692

Affected Vendors & Products

Showing 4 associated CPEs
Vendor Product Version / Range
mozilla firefox to 154 (inc)
mozilla firefox_esr to 153.1 (inc)
mozilla firefox 154
mozilla firefox_esr 153.1

Helpful Resources

Exploitability

CWE
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KEV
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CWE ID Description
CWE-UNKNOWN

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Executive Summary

This is a mitigation bypass vulnerability in Firefox's Add-ons Manager component. It allows attackers to bypass certain security measures that were meant to protect users from malicious add-ons. The issue was fixed in Firefox version 154 and Firefox ESR version 153.1.

Detection Guidance

Detection requires checking Firefox version. Run 'firefox --version' or check 'about:support' in Firefox. Versions below 154 or ESR 153.1 are vulnerable.

Impact Analysis

If exploited, this vulnerability could allow attackers to install malicious add-ons on your system without your knowledge or bypass security restrictions. This could lead to unauthorized access to your data, tracking your activities, or performing actions on your behalf without consent.

Compliance Impact

The provided CVE data does not specify any direct impact on compliance with standards like GDPR or HIPAA. The vulnerability involves a mitigation bypass in Firefox's Add-ons Manager, but no details are given about data exposure, privacy risks, or regulatory implications.

Mitigation Strategies

Update Firefox to version 154 or Firefox ESR to 153.1 or later. Disable automatic updates temporarily if needed, but patch as soon as possible.

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