CVE-2026-74958

Analyzed Analyzed - Analysis Complete

Information Disclosure in Firefox WebRTC Component

Publication date: 2026-08-18

Last updated on: 2026-08-19

Assigner: Mozilla Corporation

Description

Information disclosure in the WebRTC component. This vulnerability was fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-08-18

Last Modified

2026-08-19

Generated

2026-09-07

AI Q&A

2026-08-18

EPSS Evaluated

2026-09-06

NVD

CVE-2026-74958

EUVD

EUVD-2026-60684

Affected Vendors & Products

Vendor	Product	Version / Range
mozilla	firefox	to 154.0.0 (exc)
mozilla	thunderbird	to 154.0 (exc)
mozilla	firefox	to 153.1.0 (exc)
mozilla	thunderbird	to 153.1.0 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-1021	The web application does not restrict or incorrectly restricts frame objects or UI layers that belong to another application or domain, which can lead to user confusion about which interface the user is interacting with.

Attack-Flow Graph

Executive Summary

This is an information disclosure vulnerability in the WebRTC component of Firefox. It was addressed in Firefox 154 and Firefox ESR 153.1.

Detection Guidance

This vulnerability is an information disclosure issue in WebRTC fixed in Firefox 154, Firefox ESR 153.1, Thunderbird 154, and Thunderbird 153.1. Detection involves checking installed versions of these applications. Use commands like 'firefox --version' or 'thunderbird --version' to verify if your system is vulnerable.

Impact Analysis

An attacker could exploit this to access sensitive information through WebRTC, potentially exposing private data or communications.

Compliance Impact

The provided CVE data does not specify how this vulnerability affects compliance with standards like GDPR or HIPAA. The description only mentions an information disclosure issue in WebRTC fixed in Firefox 154 and Firefox ESR 153.1.

Mitigation Strategies

Update Firefox to version 154 or later and Firefox ESR to version 153.1 or later to address the WebRTC information disclosure vulnerability.

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