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2 vulnerabilities by Duende
CVE-2026-4349 (GCVE-0-2026-4349)
Vulnerability from nvd – Published: 2026-03-17 21:32 – Updated: 2026-03-25 10:56 Unsupported When Assigned
VLAI
Title
Duende IdentityServer4 Token Renewal Endpoint authorize improper authentication
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-287 - Improper Authentication
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.351380 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.351380 | signaturepermissions-required |
| https://vuldb.com/?submit.772071 | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Duende | IdentityServer4 |
Affected:
4.1.0
Affected: 4.1.1 Affected: 4.1.2 |
Credits
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CVE-2026-4349 (GCVE-0-2026-4349)
Vulnerability from cvelistv5 – Published: 2026-03-17 21:32 – Updated: 2026-03-25 10:56 Unsupported When Assigned
VLAI
Title
Duende IdentityServer4 Token Renewal Endpoint authorize improper authentication
Summary
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.
Severity
SSVC
Exploitation: none
Automatable: no
Technical Impact: partial
CISA Coordinator (v2.0.3)
CWE
- CWE-287 - Improper Authentication
Assigner
References
3 references
| URL | Tags |
|---|---|
| https://vuldb.com/?id.351380 | vdb-entrytechnical-description |
| https://vuldb.com/?ctiid.351380 | signaturepermissions-required |
| https://vuldb.com/?submit.772071 | third-party-advisory |
Impacted products
1 product
| Vendor | Product | Version | |
|---|---|---|---|
| Duende | IdentityServer4 |
Affected:
4.1.0
Affected: 4.1.1 Affected: 4.1.2 |
Credits
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