High severity · published Sep 13, 2026
CVE-2026-90579
cheshire-cat-ai Cheshire Cat AI custom_auth_handler.py _authorize_http_key missing authentication
7.3
CVSS
0.7%
EPSS
No
On KEV
Description
A vulnerability has been found in cheshire-cat-ai Cheshire Cat AI up to 1.9.2. This affects the function _authorize_http_key of the file core/cat/factory/custom_auth_handler.py. The manipulation of the argument user_id leads to missing authentication. The attack may be initiated remotely. The exploit has been disclosed to the public and may be used. The project was informed of the problem early through an issue report but has not responded yet.
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
Attack vector
Network
Complexity
Low
Privileges
None
User interaction
None
Confidentiality
Low
Integrity
Low
Availability
Low
Scope
Unchanged
Exploitation
Is it being used?
Exploit prediction (EPSS)0.7% · higher than 51% of CVEs
Exploited in the wildNo evidence yet
CISA KEVNot listed
Ransomware campaign useNot known
Affected products
Which versions
CC
Cheshire Cat AI · cheshire-cat-ai
1.9.0; 1.9.1; 1.9.2 · source: vendor
References
NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-90579
CVE.org
https://www.cve.org/CVERecord?id=CVE-2026-90579
github.com
https://github.com/cheshire-cat-ai/core/issues/1137
vuldb.com
https://vuldb.com/cve/CVE-2026-90579
vuldb.com
https://vuldb.com/submit/913219
vuldb.com
https://vuldb.com/vuln/403164
vuldb.com
https://vuldb.com/vuln/403164/cti
