CVE-2026-82843 WP OAuth Server < 6.4.0 - Subscriber+ Cross-User Account Takeover via OIDC ID Token Substitution

The WP OAuth Server Login with WordPress WordPress plugin before 6.4.0 does not bind the OpenID Connect identity assertion it issues to the authorization grant being exchanged, returning instead the assertion belonging to whichever user authenticated most recently, which allows users with the...

CVE-2026-82843

The WP OAuth Server (Login with WordPress) WordPress plugin, in versions before 6.4.0 , is vulnerable to a cross-user account takeover due to an improper authentication flaw. The plugin fails to bind the issued OpenID Connect identity assertion to the specific authorization grant being exchanged....

CVE-2026-19202

The mcp-toolbox-sdk-python SDK contains a caching flaw within its toolbox-core package. The module-level token cache fails to uniquely key Google ID tokens by the requested audience. If an application authenticates to multiple audiences (e.g., Service A and Service B) within the same process, a v...

CVE-2026-19202 Token Cache Reuse in mcp-toolbox-sdk-python

A caching flaw in the toolbox-core package of the mcp-toolbox-sdk-python SDK causes the same Google ID token to be cached and reused across different audiences. If an application uses the SDK to authenticate to two or more different audiences within the same process, the module-level token cache...

CVE-2026-21391

An improper validation vulnerability exists within PingAM where a well-crafted request allows arbitrary or protected ID Token claims to be set or overridden. In certain configurations this could allow an attacker to bypass authentication controls via spoofing leading to privilege escalation or...

EUVD-2026-77425

An improper validation vulnerability exists within PingAM where a well-crafted request allows arbitrary or protected ID Token claims to be set or overridden. In certain configurations this could allow an attacker to bypass authentication controls via spoofing leading to privilege escalation or...

CVE-2026-21391 Improper Claim Validation in PingAM OIDC Provider

An improper validation vulnerability exists within PingAM where a well-crafted request allows arbitrary or protected ID Token claims to be set or overridden. In certain configurations this could allow an attacker to bypass authentication controls via spoofing leading to privilege escalation or...

CVE-2026-21391

CVE-2026-21391 affects PingAM 's OIDC provider, where an improper validation of ID Token claims allows a well-crafted request to set or override arbitrary or protected claims. In certain configurations, this enables an attacker to bypass authentication controls via spoofing , leading to privilege...

CVE-2026-21391 Improper Claim Validation in PingAM OIDC Provider

An improper validation vulnerability exists within PingAM where a well-crafted request allows arbitrary or protected ID Token claims to be set or overridden. In certain configurations this could allow an attacker to bypass authentication controls via spoofing leading to privilege escalation or...

PT-2026-91163

An improper validation vulnerability exists within PingAM where a well-crafted request allows arbitrary or protected ID Token claims to be set or overridden. In certain configurations this could allow an attacker to bypass authentication controls via spoofing leading to privilege escalation or...

Improper Authentication

Overview Affected versions of this package are vulnerable to Improper Authentication through the AadOidcIdTokenDecoderFactory and AadB2cOidcIdTokenDecoderFactory OIDC ID token decoders in the Spring Cloud Azure OAuth2 login components. An attacker can elevate privileges and sign in as an...

CVE-2026-75759

Improper Verification of Cryptographic Signature vulnerability in erlef oidcc allows an unauthenticated attacker to impersonate an arbitrary user via an encrypted ID token or JARM response carrying no nested signature. OpenID Connect Core 1.0 section 2 requires that an encrypted ID token be signe...

EUVD-2026-68145

Improper Verification of Cryptographic Signature vulnerability in erlef oidcc allows an unauthenticated attacker to impersonate an arbitrary user via an encrypted ID token or JARM response carrying no nested signature. OpenID Connect Core 1.0 section 2 requires that an encrypted ID token be signe...

CVE-2026-75759 Encrypted ID token or JARM response accepted without a nested signature in erlef oidcc

Improper Verification of Cryptographic Signature vulnerability in erlef oidcc allows an unauthenticated attacker to impersonate an arbitrary user via an encrypted ID token or JARM response carrying no nested signature. OpenID Connect Core 1.0 section 2 requires that an encrypted ID token be signe...

CVE-2026-75759 Encrypted ID token or JARM response accepted without a nested signature in erlef oidcc

Improper Verification of Cryptographic Signature vulnerability in erlef oidcc allows an unauthenticated attacker to impersonate an arbitrary user via an encrypted ID token or JARM response carrying no nested signature. OpenID Connect Core 1.0 section 2 requires that an encrypted ID token be signe...

CVE-2026-75759 Encrypted ID token or JARM response accepted without a nested signature in erlef oidcc

Improper Verification of Cryptographic Signature vulnerability in erlef oidcc allows an unauthenticated attacker to impersonate an arbitrary user via an encrypted ID token or JARM response carrying no nested signature. OpenID Connect Core 1.0 section 2 requires that an encrypted ID token be signe...

EEF-CVE-2026-75759 Encrypted ID token or JARM response accepted without a nested signature in erlef oidcc

Summary Improper Verification of Cryptographic Signature vulnerability in erlef oidcc allows an unauthenticated attacker to impersonate an arbitrary user via an encrypted ID token or JARM response carrying no nested signature. OpenID Connect Core 1.0 section 2 requires that an encrypted ID token ...

CVE-2026-75759

erlef oidcc is an Erlang OpenID Connect client library. In versions 3.2.0-beta.1 through before 3.9.0 , an improper verification of cryptographic signature flaw allows an unauthenticated attacker to impersonate an arbitrary user by submitting an encrypted ID token or JARM response that contains n...

PT-2026-83516

Name of the Vulnerable Software and Affected Versions oidcc versions 3.2.0-beta.1 through 3.8.9 Description Improper verification of cryptographic signatures allows an unauthenticated attacker to impersonate any user. The issue occurs when the software accepts a JSON Web Encryption JWE wrapping...

EUVD-2026-51920

The WooCommerce - Social Login plugin for WordPress is vulnerable to Authentication Bypass in all versions up to and including 2.8.7. This is due to the plugin's Apple login handler accepting the Apple idtoken and decoding only its base64 payload without verifying the JWT signature against Apple'...