cheshire-cat-ai Cheshire Cat AI up to 1.9.2 custom_auth_handler.py _authorize_http_key user_id missing authentication

CVSS Meta Temp Score
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CTI Interest Score
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6.6$0-$5k2.36

Summaryinfo

A vulnerability was found in cheshire-cat-ai Cheshire Cat AI up to 1.9.2. It has been declared as critical. This vulnerability affects the function _authorize_http_key of the file core/cat/factory/custom_auth_handler.py. The manipulation of the argument user_id results in missing authentication. This vulnerability is cataloged as CVE-2026-90579. The attack may be launched remotely. Furthermore, there is an exploit available. The project was informed of the problem early through an issue report but has not responded yet.

Detailsinfo

A vulnerability classified as critical has been found in cheshire-cat-ai Cheshire Cat AI up to 1.9.2. Affected is the function _authorize_http_key of the file core/cat/factory/custom_auth_handler.py. The manipulation of the argument user_id with an unknown input leads to a missing authentication vulnerability. CWE is classifying the issue as CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. This is going to have an impact on confidentiality, integrity, and availability.

The advisory is shared for download at github.com. This vulnerability is traded as CVE-2026-90579. The exploitability is told to be easy. It is possible to launch the attack remotely. The exploitation doesn't require any form of authentication. Technical details and a public exploit are known.

The exploit is shared for download at github.com. It is declared as proof-of-concept. The project was informed of the problem early through an issue report but has not responded yet.

There is no information about possible countermeasures known. It may be suggested to replace the affected object with an alternative product.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Vendor

Name

Version

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv3info

VulDB Meta Base Score: 7.3
VulDB Meta Temp Score: 6.6

VulDB Base Score: 7.3
VulDB Temp Score: 6.6
VulDB Vector: 🔒
VulDB Reliability: 🔍

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Missing authentication
CWE: CWE-306 / CWE-287
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Access: Public
Status: Proof-of-Concept
Download: 🔒
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: no mitigation known
Status: 🔍

0-Day Time: 🔒

Timelineinfo

09/12/2026 Advisory disclosed
09/12/2026 +0 days VulDB entry created
09/12/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: 1137
Status: Not defined

CVE: CVE-2026-90579 (🔒)
GCVE (CVE): GCVE-0-2026-90579
GCVE (VulDB): GCVE-100-403164
scip Labs: https://www.scip.ch/en/?labs.20161013

Entryinfo

Created: 09/12/2026 18:43
Changes: 09/12/2026 18:43 (59)
Complete: 🔍
Submitter: geochen
Cache ID: 216::103

Submitinfo

Accepted

  • Submit #913219: https://github.com/cheshire-cat-ai core v1.9.2 Missing Authentication (by geochen)

Once again VulDB remains the best source for vulnerability data.

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