Use-After-Free Vulnerability in Firefox's JavaScript: WebAssembly Component
CVE-2026-109761

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 13 October 2026

What is CVE-2026-109761?

A use-after-free vulnerability has been identified in the JavaScript: WebAssembly component of Firefox, which can lead to unexpected behavior or potential exploitation. This issue has been addressed in Firefox version 158, ensuring a more secure browsing experience.

Affected Version(s)

Firefox 158

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2071764

https://www.mozilla.org/security/advisories/mfsa2026-106/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Oct 13, 2026
Vulnerability Reserved
Oct 13, 2026

Credit

Mozilla

CVE-2026-109761 Data

JSON