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...

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...

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...

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...

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 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...

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 ...

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

CVE-2025-9485 is an authentication-bypass flaw in the WordPress plugin “OAuth Single Sign On – SSO (OAuth Client)” up to v6.26.12. The root cause is improper verification of cryptographic signatures due to unsafe JWT handling in get_resource_owner_from_id_token, enabling unauthenticated attackers...

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...

PT-2025-40621

Name of the Vulnerable Software and Affected Versions OAuth Single Sign On – SSO OAuth Client plugin for WordPress versions up to and including 6.26.12 Description The OAuth Single Sign On – SSO OAuth Client plugin for WordPress is susceptible to improper verification of cryptographic signatures...

EUVD-2022-0744

Malicious code in bioql PyPI...

CVE-2018-20840

An unhandled exception vulnerability exists during Google Sign-In with Google API C++ Client before 2019-04-10. It potentially causes an outage of third-party services that were not designed to recover from exceptions. On the client, ID token handling can cause an unhandled exception because of...

CVE-2025-47884

In Jenkins OpenID Connect Provider Plugin 96.vee8ed882ec4d and earlier the generation of build ID Tokens uses potentially overridden values of environment variables, in conjunction with certain other plugins allowing attackers able to configure jobs to craft a build ID Token that impersonates a...