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TI-2026-61593 Aliases CVE-2026-90579GHSA-p5wp-72mx-m2f4

cheshire-cat-ai Cheshire Cat AI custom_auth_handler.py _authorize_http_key missing authentication

Priority HIGH 70CWE-287Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Attack requirements
None
Impact type
Security bypass
Confidentiality · integrity · availability
Low · Low · Low
Fix status
No fix listed

Attack profile from CVSS 4.0 · CNA. Fix status from CNA. Impact type from CWE-287.

Summary

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.

Why it matters now

Exploitation Proof of concept CISA SSVC · not in CISA KEV
EPSS 0.00654 51st percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by the CNA
Fix No fix listed No fixed version in the sources yet

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Poc
Automatable
Yes
Technical impact
Partial

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
cheshire-cat-aiCheshire Cat AI1.9.0; 1.9.1; 1.9.2—No fix listedCNA
  • Cheshire Cat AI Vendorcheshire-cat-ai Affected 1.9.0; 1.9.1; 1.9.2 Fixed in — No fix listed CNA

CPE names CNA · 1

CPEVersionsRoleVendor
cpe:2.3:a:cheshire-cat-ai:cheshire_cat_ai:*:*:*:*:*:*:*:*———
  • cpe:2.3:a:cheshire-cat-ai:cheshire_cat_ai:*:*:*:*:*:*:*:* Versions — — ·—

Remediation

No fixed version listed by the sources yet.

Timeline

  1. 2026-10-02 Threatist record created from CVE-2026-90579
  2. 2026-10-03 Alias added: GHSA-p5wp-72mx-m2f4
  3. 2026-10-13 EPSS moved to the 50th–90th percentile

References

Exploit 1

  • TI-2026-58452 Cheshire Cat AI Memory Collection Endpoint Information Disclosure CVSS 4.0HIGH 7.1
  • TI-2026-70704 Stored cross-site scripting in Cheshire Cat AI core uploads plugin CVSS 4.0MEDIUM 5.1

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences