CVE-2026-16382

Undergoing Analysis Undergoing Analysis - In Progress

DOM Service Workers Mitigation Bypass in Firefox

Publication date: 2026-07-21

Last updated on: 2026-07-24

Assigner: Mozilla Corporation

Description

Mitigation bypass in the DOM: Service Workers component. This vulnerability was fixed in Firefox 153 and Thunderbird 153.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published

2026-07-21

Last Modified

2026-07-24

Generated

2026-08-10

AI Q&A

2026-07-21

EPSS Evaluated

2026-08-09

NVD

CVE-2026-16382

EUVD

EUVD-2026-46219

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	thunderbird	to 153.0 (exc)
mozilla	firefox	to 153.0.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
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

Executive Summary

This vulnerability is a mitigation bypass in the DOM: Service Workers component of Firefox. It allows attackers to bypass security measures that were meant to protect against certain types of attacks. The issue was resolved in Firefox version 153.

Detection Guidance

Detection requires checking Firefox version. Run 'firefox --version' in terminal. If version is below 153, the system is vulnerable.

Impact Analysis

If exploited, this vulnerability could allow an attacker to bypass security restrictions, potentially leading to unauthorized access to sensitive data or execution of malicious code on your system. Users of affected Firefox versions should update to Firefox 153 or later to mitigate the risk.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The description only mentions a mitigation bypass in the DOM: Service Workers component fixed in Firefox 153.

Mitigation Strategies

Update Firefox to version 153 or later immediately. Disable Service Workers if updating is not possible by setting 'dom.serviceWorkers.enabled' to false in about:config.

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