CVE-2026-90579CWE-287CWE-306

CVE-2026-90579

High · published September 13, 2026

CVSS v3.1
7.3
EPSS
1%
Percentile
50.7
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
7.3 · HIGH
Vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:L
CVSS v4.0
6.9 · 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
EPSS
0.00654 · 50.7th percentile
Weaknesses
CWE-287 · Improper Authentication; CWE-306 · Missing Authentication for Critical Function
Published
2026-09-13T23:16Z
References (5)
https://github.com/cheshire-cat-ai/core/issues/1137 · [email protected]https://vuldb.com/cve/CVE-2026-90579 · [email protected]https://vuldb.com/submit/913219 · [email protected]https://vuldb.com/vuln/403164 · [email protected]https://vuldb.com/vuln/403164/cti · [email protected]
EPSS history
Timeline
  • 15 SEP 03:22Z
    EPSS moved — → 0%
    epss
  • 13 SEP 19:00Z
    cheshire-cat-ai Cheshire Cat AI custom_auth_handler.py _authorize_http_key missing authentication
    cvelistv5