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Mozilla Firefox and Firefox ESR Use-After-Free Vulnerability in WebIDL Bindings Component

Vulnerability

A use-after-free vulnerability has been identified in the DOM: Bindings (WebIDL) component of Mozilla Firefox and Firefox ESR. This vulnerability allows for memory corruption, which could potentially be exploited to execute arbitrary code. It affects Firefox versions prior to 151, as well as Firefox ESR versions 115.35 and 140.10.

Impact

Exploitation of this vulnerability could lead to memory corruption and potentially allow for arbitrary code execution.

Remediation

Users can upgrade to Firefox 151, Firefox ESR 115.36, or Firefox ESR 140.11 to address this vulnerability.

Added: May 19, 2026, 2:51 PM
Updated: May 19, 2026, 2:51 PM

Vulnerability Rating

Custom Algorithm
spread
8.4
impact
7.5
exploitability
3.8
remediation
7.7
relevance
8.8
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.