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CVE-2026-4349: Improper Authentication

🗓️ 17 Mar 2026 00:00:00Reported by Rapid7Type 
rapid7
 rapid7
🔗 www.rapid7.com👁 1 Views

Remote improper authentication in Duende IdentityServer4 up to 4.1.2 via id_token_hint.

Related
Refs
ReporterTitlePublishedViews
Family
attackerkb
attackerkb
CVE-2026-4349
17 Mar 202621:32
–attackerkb
cnnvd
CNNVD
Duende IdentityServer 授权问题漏洞
17 Mar 202600:00
–cnnvd
cve
CVE
CVE-2026-4349
17 Mar 202621:32
–cve
cvelist
Cvelist
CVE-2026-4349 Duende IdentityServer4 Token Renewal Endpoint authorize improper authentication
17 Mar 202621:32
–cvelist
euvd
EUVD
EUVD-2026-12659
18 Mar 202600:30
–euvd
nvd
NVD
CVE-2026-4349
17 Mar 202622:16
–nvd
ptsecurity
Positive Technologies
PT-2026-25949
17 Mar 202600:00
–ptsecurity
redhatcve
RedhatCVE
CVE-2026-4349
26 Mar 202615:06
–redhatcve
vulnrichment
Vulnrichment
CVE-2026-4349 Duende IdentityServer4 Token Renewal Endpoint authorize improper authentication
17 Mar 202621:32
–vulnrichment

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22 Apr 2026 00:00Current
5Medium risk
Vulners AI Score5
CVSS 3.15.6
CVSS 46.3
CVSS 25.1
CVSS 35.6
EPSS0.00536
SSVC
1