EUVD-2026-92023

OpenAM before 16.1.3 applies its OAuth2 Provider PKCE enforcement only to authorization requests whose responsetype is exactly code, so codes issued through OpenID Connect hybrid flows code token, code idtoken, code token idtoken carry no bound challenge. An attacker who intercepts such a code ca...

org.apache.cxf/cxf: Apache CXF: Authorization Code Substitution via missing c_hash validation

A flaw was found in Apache CXF. When operating in the OpenID Connect Hybrid Flow, Apache CXF does not enforce the validation of the chash parameter. This vulnerability allows a remote attacker, through a non-compliant or misconfigured Identity Provider IdP, to perform Authorization Code...

CVE-2026-57817

A flaw was found in Apache CXF. When operating in the OpenID Connect Hybrid Flow, Apache CXF does not enforce the validation of the chash parameter. This vulnerability allows a remote attacker, through a non-compliant or misconfigured Identity Provider IdP, to perform Authorization Code...

Improper Verification of Cryptographic Signature

Overview org.apache.cxf:cxf-rt-rs-security-sso-oidc is an Apache CXF Runtime OpenId Connect library. Affected versions of this package are vulnerable to Improper Verification of Cryptographic Signature in the OpenID Connect Hybrid Flow when the chash parameter is not validated. An attacker can...

CVE-2026-57817

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the chash parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider IdP that omits the chash, the RP becomes vulnerable to Authorization Code...

CVE-2026-57817

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the chash parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider IdP that omits the chash, the RP becomes vulnerable to Authorization Code...

CVE-2026-57817 Apache CXF: The authorization code hash (c_hash) is not enforced for the hybrid OIDC flow

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the chash parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider IdP that omits the chash, the RP becomes vulnerable to Authorization Code...

CVE-2026-57817

A flaw in Apache CXF allows for Authorization Code Substitution/Injection attacks during the OpenID Connect Hybrid Flow. The vulnerability occurs because the cxf-rt-rs-security-sso-oidc library (and the broader cxf component) fails to enforce the validation of the c_hash parameter, as required by...

EUVD-2026-53855

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the chash parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider IdP that omits the chash, the RP becomes vulnerable to Authorization Code...

CVE-2026-57817 Apache CXF: The authorization code hash (c_hash) is not enforced for the hybrid OIDC flow

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the chash parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider IdP that omits the chash, the RP becomes vulnerable to Authorization Code...

CVE-2026-57817: Improper Input Validation

The OpenID Connect Core 1.0 specification mandates that the RP MUST validate the chash parameter when operating in the Hybrid Flow. If an Apache CXF RP is integrated with a non-compliant or misconfigured Identity Provider IdP that omits the chash, the RP becomes vulnerable to Authorization Code...

CVE-2026-44681 Authlib: Open Redirect in Authlib OIDC Implicit/Hybrid Authorization

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.12 and 1.7.1, an unauthenticated open redirect in Authlib's OpenIDImplicitGrant and OpenIDHybridGrant authorization endpoint lets a remote attacker cause the authorization server to issue an HTTP 302 to an...