CVE-2026-90579 cheshire-cat-ai Cheshire Cat AI - Authentication Bypass

cheshire-cat-ai Cheshire Cat AI <= 1.9.2 contains an authentication bypass caused by manipulation of the user_id argument in _authorize_http_key function, letting remote attackers bypass authentication, exploit requires crafted user_id input.

CVSS base score 7.3 /10
High
CISA KEV
Not listed
Public exploit
None known
Authentication
Not required
EPSS
0.65% chance of exploitation in 30 days
View the NVD record ↗

Details

Type
Authentication Bypass
Impact
Broken Authentication
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Published
13 September 2026
Updated
15 October 2026
Weakness
CWE-287

Vendor fix

Update to the latest version.

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

← All CVEs