# CVE-2026-90579

## Summary

- **CVE ID:** CVE-2026-90579
- **Severity:** MEDIUM
- **CVSS Score:** 7.5 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:L/VA:L/SC:N/SI:N/SA:N/E:P)
- **CWE:** CWE-306, CWE-287
- **Published:** Sep 13, 2026
- **Last Modified:** Sep 14, 2026

## 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.

## Affected Products

- cheshire-cat-ai — Cheshire Cat AI (1.9.0)
- cheshire-cat-ai — Cheshire Cat AI (1.9.1)
- cheshire-cat-ai — Cheshire Cat AI (1.9.2)

## References

- [CNA](https://vuldb.com/vuln/403164)
- [CNA](https://vuldb.com/vuln/403164/cti)
- [CNA](https://vuldb.com/cve/CVE-2026-90579)
- [CNA](https://vuldb.com/submit/913219)
- [CNA](https://github.com/cheshire-cat-ai/core/issues/1137)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.39%
- **EPSS Percentile:** 32.9

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-17._