PT-2026-21724 · Mozilla · Firefox+2
Surya Dev Singh
·
Published
2026-01-01
·
Updated
2026-03-18
·
CVE-2026-2791
CVSS v3.1
9.8
Critical
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H |
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
A mitigation bypass exists in the Networking: Cache component. This issue may allow bypassing existing security measures.
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
Authentication Bypass Using an Alternate Path or Channel
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Weakness Enumeration
Related Identifiers
Affected Products
Firefox
Firefox Esr
Thunderbird