Denial of Service Vulnerability in Firefox Security Component
CVE-2026-92078

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 15 September 2026

What is CVE-2026-92078?

A vulnerability has been identified in the security component of Firefox, allowing attackers to execute denial-of-service attacks. This affects specific versions of the browser, but has been addressed in the latest updates. Users are advised to update to Firefox 156 or Firefox ESR 153.3 to mitigate potential risks. Further details can be accessed through Mozilla’s official security advisories.

Affected Version(s)

Firefox 153.3

Firefox 156

References

https://bugzilla.mozilla.org/show_bug.cgi?id=2066736

https://www.mozilla.org/security/advisories/mfsa2026-90/

https://www.mozilla.org/security/advisories/mfsa2026-93/

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Sep 15, 2026
Vulnerability Reserved
Sep 15, 2026

Credit

Dominik Bay

CVE-2026-92078 Data

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