PT-2026-27414 · Mozilla+1 · Thunderbird+3
Pwn2Addr
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Published
2026-01-01
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Updated
2026-04-17
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CVE-2026-4716
CVSS v3.1
9.1
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:H |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 149
Firefox ESR versions prior to 140.9
Thunderbird versions prior to 149
Thunderbird versions prior to 140.9
Description
The software contains issues related to incorrect boundary conditions and uninitialized memory within the JavaScript Engine component.
Recommendations
Update Firefox to version 149 or later.
Update Firefox ESR to version 140.9 or later.
Update Thunderbird to version 149 or later.
Update Thunderbird to version 140.9 or later.
Fix
Use of Uninitialized Resource
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Weakness Enumeration
Related Identifiers
Affected Products
Firefox
Firefox Esr
Rocky Linux
Thunderbird