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CVE-2026-4349

🗓️ 17 Mar 2026 21:32:11Reported by VulDBType 
cve
 cve
🔗 web.nvd.nist.gov👁 3 Views🌐 WEB

CVE-2026-4349: Duende IdentityServer token renewal endpoint allows improper authentication via id_token_hint manipulation.

Related
Detection
Affected
Refs
Paths
ReporterTitlePublishedViews
Family
ATTACKERKB
CVE-2026-4349
17 Mar 202621:32
attackerkb
CNNVD
Duende IdentityServer 授权问题漏洞
17 Mar 202600:00
cnnvd
Cvelist
CVE-2026-4349 Duende IdentityServer4 Token Renewal Endpoint authorize improper authentication
17 Mar 202621:32
cvelist
EUVD
EUVD-2026-12659
18 Mar 202600:30
euvd
NVD
CVE-2026-4349
17 Mar 202622:16
nvd
Positive Technologies
PT-2026-25949
17 Mar 202600:00
ptsecurity
RedhatCVE
CVE-2026-4349
26 Mar 202615:06
redhatcve
Vulnrichment
CVE-2026-4349 Duende IdentityServer4 Token Renewal Endpoint authorize improper authentication
17 Mar 202621:32
vulnrichment
Vulners
[
  {
    "vendor": "Duende",
    "product": "IdentityServer4",
    "versions": [
      {
        "version": "4.1.0",
        "status": "affected"
      },
      {
        "version": "4.1.1",
        "status": "affected"
      },
      {
        "version": "4.1.2",
        "status": "affected"
      }
    ],
    "modules": [
      "Token Renewal Endpoint"
    ]
  }
]
ParameterPositionPathDescriptionCWE
id_token_hintquery param/connect/authorizeManipulation of id_token_hint in the Token Renewal Endpoint causes improper authentication.CWE-287

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22 Apr 2026 21:32Current
5.7Medium risk
Vulners AI Score5.7
CVSS 25.1
CVSS 3.15.6
CVSS 46.3
CVSS 35.6
EPSS0.00024
SSVC
3