CVE-2026-8955

High

Published: 19/05/2026(UTC)Translated: 15/06/2026(UTC)NVD NIST

Summary

The vulnerability allows privilege escalation in the DOM: Workers component. It was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.

Risk Assessment

Privilege escalation may lead to unauthorized access to system resources, posing a serious security threat to the organization.

Recommendation

It is recommended to update to the latest versions of Firefox and Thunderbird to mitigate this vulnerability.

Original NVD description (English source)

Privilege escalation in the DOM: Workers component. This vulnerability was fixed in Firefox 151, Firefox ESR 140.11, Thunderbird 151, and Thunderbird 140.11.