Spoofing Vulnerability in Firefox Affects Multiple Versions

CVE-2026-0890

What is CVE-2026-0890?

A spoofing vulnerability has been identified in the DOM functionalities related to Copy & Paste and Drag & Drop components in Firefox. This issue allows malicious actors to manipulate users’ interactions through deceptive means when using affected versions of the browser. Specifically, this impacts Firefox versions prior to 147 and Firefox ESR versions prior to 140.7. Users are advised to update their browsers to the latest versions to mitigate the risk associated with this vulnerability.

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