PT-2026-21716 · Mozilla · Firefox+2
X0E
·
Published
2026-01-01
·
Updated
2026-03-18
·
CVE-2026-2783
CVSS v3.1
7.5
High
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N |
Name of the Vulnerable Software and Affected Versions
Firefox versions prior to 148
Firefox ESR versions prior to 140.8
Thunderbird versions prior to 148
Thunderbird versions prior to 140.8
Description
An information disclosure issue exists due to Just-In-Time (JIT) miscompilation within the JavaScript Engine’s JIT component. This can potentially expose sensitive data.
Recommendations
Update Firefox to version 148 or later.
Update Firefox ESR to version 140.8 or later.
Update Thunderbird to version 148 or later.
Update Thunderbird to version 140.8 or later.
Fix
Type Confusion
Information Disclosure
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Related Identifiers
Affected Products
Firefox
Firefox Esr
Thunderbird