Spoofing Vulnerability in Firefox for Android
CVE-2026-2800

9.8CRITICAL

Key Information:

Vendor

Mozilla
Status
Firefox
Thunderbird
Vendor
CVE Published:
24 February 2026

What is CVE-2026-2800?

A spoofing vulnerability in the WebAuthn component of Firefox for Android allows an attacker to manipulate user perceptions and potentially mislead them into conducting unintended actions. This issue specifically affects versions of Firefox for Android prior to 148, posing a risk to users who rely on web authentication methods.

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Affected Version(s)

Firefox < 148

Thunderbird < 148

References

https://bugzilla.mozilla.org/show_bug.cgi?id=1988145
https://www.mozilla.org/security/advisories/mfsa2026-13/
https://www.mozilla.org/security/advisories/mfsa2026-16/

CVSS V3.1

Score:
9.8
Severity:
CRITICAL
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
Low
Privileges Required:
None
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

hafiizh & kang ali
JSON
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