Reference page — cumulative record through Sunday, October 4, 2026 UTC. Reference pages update as the archive grows; only dated daily editions are immutable pages of record.

CVE-2026-90579

CVE-2026-90579MEDIUM

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

  AV  AC  AT  PR  UI  VC  VI  VA   CVSS    EPSS   %ile   KEV
   N   L   N   N   N   L   L   L    5.5   .0065   49.6     —

AFFECTED
  Product          Versions  Fixed
  Cheshire Cat AI  1.9.0 –   —

TIMELINE
  Sep 12  Reserved by VulDB
  Sep 13  Published (CNA: VulDB)
  Sep 14  EXPLOIT PUBLISHED — CVE-2026-90579 (cheshire-cat-ai Cheshire Cat AI). Public exploit reference added.

CWE-287, CWE-306 · CNA: VulDB · CVSS v4.0 · 5 references · NVD status: Deferred

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.

Lifecycle

Complete event history — 3 events, chronological
Date	Event	Detail
September 12, 2026	Reserved	Reserved by VulDB
September 13, 2026	Published	Published (CNA: VulDB)
September 14, 2026	EXPLOIT PUBLISHED	EXPLOIT PUBLISHED — CVE-2026-90579 (cheshire-cat-ai Cheshire Cat AI). Public exploit reference added.

Affected

Affected products and packages — 1 row
Vendor	Product / Package	Ecosystem	Version introduced	Fixed
cheshire-cat-ai	Cheshire Cat AI	—	1.9.0	—

Weaknesses

CWE-287 · CWE-306

References (5)

Authoritative record: CVE-2026-90579 at cve.org

Vendors: cheshire-cat-ai

Weaknesses: CWE-287 · CWE-306

About this page

This is a reference page, not a dated page of record. It assembles the complete lifecycle of CVE-2026-90579 from the CVE Program record, NVD enrichment, the CISA KEV catalog, EPSS, and OSV advisories. The box score's numbers (CVSS, EPSS, KEV status) are current as of Sunday, October 4, 2026 UTC and are re-derived as the archive grows; only dated daily editions are immutable pages of record. The authoritative source for this identifier is cve.org.