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CVE-2026-2800
DEB
Critical

Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

CVSS
9.8
Critical
EPSS
0.00
p22
Published
2026-01-01
Updated
2026-01-01
Description

Spoofing issue in the WebAuthn component in Firefox for Android. This vulnerability was fixed in Firefox 148 and Thunderbird 148.

Tags · CWE
Pre-auth
CWE-290
CAPEC-21
CAPEC-22
CAPEC-59
CAPEC-60
CAPEC-94
CAPEC-459
CAPEC-461
CAPEC-473
CAPEC-476
CAPEC-667
Affected products
Firefox < 148.0Thunderbird < 148.0
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Timeline
2026-01-01
Published
2026-01-01
Updated
CVSS 3.1 breakdown
Attack Vector
AV: N
Network (N)
Attack Complexity
AC: L
Low (L)
Privileges Required
PR: N
None (N)
User Interaction
UI: N
None (N)
Scope
S: U
Unchanged (U)
Confidentiality Impact
C: H
High (H)
Integrity Impact
I: H
High (H)
Availability Impact
A: H
High (H)
Exploit indicators
EPSS
0.003 · p22
Known exploited (KEV)
No
MITRE ATT&CK
Inferred via CAPEC
└ via CAPEC-473 · CWE-290
└ via CAPEC-21 · CWE-290
└ via CAPEC-60 · CWE-290
└ via CAPEC-21 · CWE-290
└ via CAPEC-21 · CWE-290
└ via CAPEC-60 · CWE-290
└ via CAPEC-473 · CWE-290
└ via CAPEC-94 · CWE-290
Known exploits — Сканер-ВС
No Сканер-ВС checks registered for this vulnerability yet.
Affected products
ProductVendorStatus
firefoxTracked
firefox*Tracked
thunderbird*Tracked