Security Advisory

CVE-2026-4349

CVE vulnerability detail — eXtreme Datacenter Security Operations

Published 2026-03-17 21:32:11

Last updated 2026-03-25 10:56:05

Assigner VulDB

State PUBLISHED

Description

A vulnerability was determined in Duende IdentityServer4 up to 4.1.2. 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. This vulnerability only affects products that are no longer supported by the maintainer.

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