CVE-2026-92051 Firefox - Spoofing

Firefox contains a spoofing vulnerability caused by an invalid pointer in the Graphics component, letting attackers spoof content, exploit requires no special conditions.

CVSS base score 9.1 /10
Critical
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.53% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Spoofing
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:H
Published
15 September 2026
Updated
15 October 2026
Weakness
CWE-476

Vendor fix

Update to Firefox 156 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

References

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