CVE-2026-4349

MEDIUM

5.6

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.

CVE Details

CVSS v3.1 Score5.6

SeverityMEDIUM

CVSS VectorCVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:L

Attack VectorNETWORK

ComplexityHIGH

Privileges RequiredNONE

User InteractionNONE

Published3/17/2026

Last Modified3/25/2026

Sourcenvd

Honeypot Sightings0

Weaknesses (CWE)

CWE-287

References

https://vuldb.com/?ctiid.351380(cna@vuldb.com)

https://vuldb.com/?id.351380(cna@vuldb.com)

https://vuldb.com/?submit.772071(cna@vuldb.com)

IOC Correlations

No correlations recorded

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