Description

A vulnerability was determined in Duende IdentityServer 4. The affected element is an unknown function of the file /connect/authorize of the component Token Renewal Endpoint. This manipulation of the argument id_token_hint causes improper authentication. It is possible to initiate the attack remotely. The attack is considered to have high complexity. The exploitability is described as difficult. The vendor was contacted early about this disclosure but did not respond in any way.

INFO

Published Date :

2026-03-17T21:32:11.670Z

Last Modified :

2026-03-18T19:59:09.789Z

Source :

VulDB
AFFECTED PRODUCTS

The following products are affected by CVE-2026-4349 vulnerability.

Vendors Products
Duende
  • Identityserver
REFERENCES

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-4349.

URL Resource
https://vuldb.com/?ctiid.351380 cve-icon cve-icon
https://vuldb.com/?id.351380 cve-icon cve-icon
https://vuldb.com/?submit.772071 cve-icon cve-icon
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CVSS Vulnerability Scoring System

Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Attack Requirements
Privileges Required
User Interaction
VS Confidentiality
VS Integrity
VS Availability
SS Confidentiality
SS Integrity
SS Availability
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Detailed values of each vector for above chart.
Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality Impact
Integrity Impact
Availability Impact
Detailed values of each vector for above chart.
Access Vector
Access Complexity
Authentication
Confidentiality Impact
Integrity Impact
Availability Impact