PT-2026-84171 · Mozilla · Firefox+2
CVE-2026-84118
·
Published
2026-09-01
·
Updated
2026-09-05
CVSS v3.1
5.4
Medium
| Vector | AV:N/AC:L/PR:N/UI:R/S:U/C:L/I:L/A:N |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 155
Firefox ESR versions prior to 153.2
Thunderbird versions prior to 155
Thunderbird versions prior to 153.2
Description
A use-after-free issue exists in the JavaScript: GC component. Use-after-free is a memory corruption flaw that occurs when an application continues to use a pointer after it has been freed.
Recommendations
Update Firefox to version 155.
Update Firefox ESR to version 153.2.
Update Thunderbird to version 155.
Update Thunderbird to version 153.2.
Fix
Use After Free
Found an issue in the description? Have something to add? Feel free to write us 👾
Weakness Enumeration
Related Identifiers
Affected Products
Firefox
Firefox Esr
Thunderbird