EUVD-2026-12659

A vulnerability was determined in Duende IdentityServer 4. The affected element is an unknown function of the file /connect/authorize of the component Token Renewal Endpoint. This manipulation of the argument idtokenhint causes improper authentication. It is possible to initiate the attack...

CVE-2026-4349

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 idtokenhint causes improper authentication. It is possible to initiate the...

CVE-2026-4349 Duende IdentityServer4 Token Renewal Endpoint authorize improper authentication

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 idtokenhint causes improper authentication. It is possible to initiate the...

CVE-2026-4349

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 idtokenhint causes improper authentication. It is possible to initiate the...

CVE-2026-4349 Duende IdentityServer4 Token Renewal Endpoint authorize improper authentication

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 idtokenhint causes improper authentication. It is possible to initiate the...

CVE-2026-4349

CVE-2026-4349 affects Duende IdentityServer 4; vulnerable component is the Token Renewal Endpoint under /connect/authorize, where manipulation of the id_token_hint argument leads to improper authentication. The issue is described as remote-exploitable with high attack complexity, but the provided...

PT-2026-25949

A vulnerability was determined in Duende IdentityServer 4. 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...

CVE-2026-28498

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to version 1.6.9, a library-level vulnerability was identified in the Authlib Python library concerning the validation of OpenID Connect OIDC ID Tokens. Specifically, the internal hash verification logic verifyhash...

GHSA-M344-F55W-2M6J Authlib: Fail-Open Cryptographic Verification in OIDC Hash Binding

Executive Summary A critical library-level vulnerability was identified in the Authlib Python library concerning the validation of OpenID Connect OIDC ID Tokens. Specifically, the internal hash verification logic verifyhash responsible for validating the athash Access Token Hash and chash...

Authlib: Fail-Open Cryptographic Verification in OIDC Hash Binding

Executive Summary A critical library-level vulnerability was identified in the Authlib Python library concerning the validation of OpenID Connect OIDC ID Tokens. Specifically, the internal hash verification logic verifyhash responsible for validating the athash Access Token Hash and chash...

PT-2026-25790

Authlib and Affected Versions Authlib versions prior to 1.6.9 Description Authlib, a Python library for building OAuth and OpenID Connect servers, contains a flaw in its OpenID Connect OIDC ID Token validation logic. The internal hash verification function verify hash exhibits a fail-open behavio...

Improper Input Validation

org.openidentityplatform.openam, openam-oauth2 is vulnerable to improper input validation. The vulnerability is due to improper validation of the claimsparametersupported feature in the oidc-claims-extension.groovy script, which allows an attacker to inject a crafted JSON claims parameter in the...

CVE-2025-64099

Open Access Management OpenAM is an access management solution. In versions prior to 16.0.0, if the "claimsparametersupported" parameter is activated, it is possible, thanks to the "oidc-claims-extension.groovy" script, to inject the value of one's choice into a claim contained in the idtoken or ...

GHSA-39HR-239P-FHQC OpenAM: Using arbitrary OIDC requested claims values in id_token and user_info is allowed

Summary If the "claimsparametersupported" parameter is activated, it is possible through the "oidc-claims-extension.groovy" script, to inject the value of choice into a claim contained in the idtoken or in the userinfo. Authorization function requests do not prevent a claims parameter containing ...

CVE-2025-64099 OpenAM allows use of arbitrary OIDC requested claims values in id_token and user_info

Open Access Management OpenAM is an access management solution. In versions prior to 16.0.0, if the "claimsparametersupported" parameter is activated, it is possible, thanks to the "oidc-claims-extension.groovy" script, to inject the value of one's choice into a claim contained in the idtoken or ...

CVE-2025-64099

OpenAM prior to version 16.0.0 is vulnerable when the claims_parameter_supported parameter is enabled. The oidc-claims-extension.groovy script allows injecting arbitrary values into claims in id_token and user_info via a crafted claims parameter JSON during an authorize request, enabling potentia...

OESA-2025-2430 google-oauth-java-client security update

Written by Google, the Google OAuth Client Library for Java is a powerful and easy-to-use Java library for the OAuth 1.0a and OAuth 2.0 authorization standards. The Google OAuth Client Library for Java is designed to work with any OAuth service on the web, not just with Google APIs. It is built o...

EUVD-2018-13380

Malware in sbrugna...

CVE-2025-9485

The OAuth Single Sign On – SSO OAuth Client plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 6.26.12. This is due to the plugin performing unsafe JWT token processing without verification or validation in the...

CVE-2025-9485 OAuth Single Sign On – SSO (OAuth Client) <= 6.26.12 - Authentication Bypass via get_resource_owner_from_id_token()

The OAuth Single Sign On – SSO OAuth Client plugin for WordPress is vulnerable to Improper Verification of Cryptographic Signature in versions up to, and including, 6.26.12. This is due to the plugin performing unsafe JWT token processing without verification or validation in the...