Memory Corruption Vulnerabilities in Firefox by Mozilla
CVE-2026-84144

Currently unrated

Key Information:

Vendor: Mozilla
Status: Firefox
Vendor: CVE Published:; 1 September 2026

What is CVE-2026-84144?

Internally discovered memory corruption vulnerabilities in Firefox versions 154 and ESR 153.1 raised concerns about potential exploitation. These issues were identified and subsequently addressed in Firefox version 155 and Firefox ESR version 153.2, reinforcing user security and protecting against possible attacks that could leverage these defects.

Affected Version(s)

Firefox 153.2

Firefox 155

References

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2054619%2...

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2054625%2...

https://bugzilla.mozilla.org/buglist.cgi?bug_id=2054691%2...

Download the Critical Vulnerability Management Cheat Sheet

Timeline

Vulnerability published
Sep 1, 2026
Vulnerability Reserved
Sep 1, 2026

Credit

Leo Tenenbaum, Tom Ritter and the Mozilla Fuzzing Team

CVE-2026-84144 Data

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