CVE-2026-90579 Details
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.
A missing authentication vulnerability has been identified in Cheshire Cat AI versions through 1.9.2. The issue arises in the custom authentication handler, specifically within the '_authorize_http_key' function of 'core/cat/factory/custom_auth_handler.py'. The vulnerability allows remote attackers to manipulate the 'user_id' header, bypassing authentication and gaining unauthorized access to user data. This flaw was reported to the project, but no response has been received.
Metrics
CVSS 4.0 Severity and Vector Strings:
VolerionCVSS 3.x Severity and Vector Strings:
No data available for CVSS Version 2.0 on this CVE.
Volerion
Assessed Sep 13, 2026CISA-ADP
Assessed Sep 14, 2026References to Advisories, Solutions, and Tools
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| URL | Source(s) | Tag(s) |
|---|---|---|
| https://github.com/cheshire-cat-ai/core/issues/1137 | [email protected] | ExploitIssue TrackingTechnical DescriptionVendor |
| https://vuldb.com/cve/CVE-2026-90579 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/submit/913219 | [email protected] | Issue TrackingPermission Required |
| https://vuldb.com/vuln/403164 | [email protected] | AdvisoryPermission Required |
| https://vuldb.com/vuln/403164/cti | [email protected] | Content Wall |
Weakness Enumeration
| CWE-ID | CWE Name | Source |
|---|---|---|
| CWE-287 | Improper Authentication | [email protected] |
| CWE-306 | Missing Authentication for Critical Function | [email protected] |
Affected Products
| Product | Versions |
|---|---|
| cheshire-cat-ai Cheshire Cat AI | <= 1.9.2 (semver) |
CPE
Remediation
| |
Change History
2 change records found show changes
| Date | Action | Recorded By |
|---|---|---|
| Sep 14, 2026 | CVE Modified | CISA-ADP |
| Sep 13, 2026 | New CVE Received | [email protected] |