Use-After-Free Vulnerability in Mozilla Firefox Products

CVE-2026-12291

What is CVE-2026-12291?

A use-after-free vulnerability has been identified in the Networking component of Mozilla Firefox, which could allow attackers to manipulate memory. This issue can lead to potential exploitation through crafted HTTP requests. Mozilla has provided fixes in Firefox version 152 and the Extended Support Releases (ESR) 140.12 and 115.37. Users are encouraged to update their browsers to ensure the integrity and security of their online activities.

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