PT-2026-25949 · Duende · Duende Identityserver 4

Edcarlos + 1 · Publicado 2026-03-17 · Atualizado 2026-03-18 · CVE-2026-4349

Positive Technologies (AI Summary)

CVSS v3.1

5.6

Média

Vetor base

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

Name of the Vulnerable Software and Affected Versions Duende IdentityServer version 4

Description A security issue exists in Duende IdentityServer 4 related to improper authentication. Manipulation of the id token hint argument within an unknown function of the /connect/authorize file in the Token Renewal Endpoint component can lead to unauthorized access. The attack can be initiated remotely and is considered to have high complexity with difficult exploitability. The vendor was contacted regarding this issue but did not respond.

Recommendations At the moment, there is no information about a newer version that contains a fix for this vulnerability.

Improper Authentication

Enumeração de Fraquezas

CWE-287

Identificadores relacionados

CVE-2026-4349

Produtos afetados

Duende Identityserver 4

Referências · 5

• https://vuldb.com/?submit.772071 · Nota
• https://nvd.nist.gov/vuln/detail/CVE-2026-4349 · Nota de Segurança
• https://vuldb.com/?id.351380 · Nota
• https://twitter.com/CVEnew/status/2034136469200158720 · Publicação no Twitter
• https://vuldb.com/?ctiid.351380 · Nota