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Mozilla Firefox and Firefox ESR WebRTC Denial-of-Service Vulnerability

Vulnerability

A denial-of-service vulnerability has been identified in the WebRTC signaling component of Mozilla Firefox. This issue affects Firefox versions prior to 149 and Firefox ESR versions prior to 140.9. The vulnerability can be exploited to cause a crash or unresponsive state in the browser.

Impact

Exploitation of this vulnerability leads to a denial-of-service condition, causing the browser to become unresponsive or to crash.

Remediation

Users can upgrade to Firefox 149 or Firefox ESR 140.9 to address this vulnerability.

Added: Mar 24, 2026, 1:41 PM
Updated: Mar 24, 2026, 1:41 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
2.5
exploitability
4.7
remediation
7.7
relevance
4.6
threat
0.0
urgency
2.9
incentive
0.0

Our algorithm analyzes dozens of metrics to generate these 8 key vulnerability categories, which are then combined to calculate the overall risk score.