Site Isolation Issue in Firefox Navigation Component by Mozilla
CVE-2026-124914

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 10 November 2026

What is CVE-2026-124914?

A site isolation issue was identified in the navigation component of Firefox, which could lead to potential security risks. This vulnerability was addressed in the recent updates of Firefox 160 and Firefox ESR 153.7, ensuring enhanced protection for users by mitigating risks associated with cross-site data exposure. Users are advised to upgrade to the latest versions to maintain security integrity.

Affected Version(s)

Firefox 153.7

Firefox 160

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2056107

https://www.mozilla.org/security/advisories/mfsa2026-125/

https://www.mozilla.org/security/advisories/mfsa2026-127/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Nov 10, 2026
Vulnerability Reserved
Nov 9, 2026

Credit

thegoldmandm

CVE-2026-124914 Data

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