Authlib: ID token can disable its own nonce validation via the nonce_supported claim

Summary OpenIDMixin.parseidtoken reads the noncesupported claim from the ID token it is validating. When that claim is boolean false, the expected nonce is set to None and nonce validation is skipped for that token. An ID token that carries this claim is therefore accepted in a session whose nonc...

CVE-2026-93394 libmongoc SCRAM client nonce-validation bypass

A flaw in libmongoc's SCRAM authentication implementation caused the client to continue the authentication handshake and transmit the client proof even when a nonce mismatch was detected in the server's first message. An unauthorized party with a man-in-the-middle position could exploit this by...

CVE-2026-93394

libmongoc (MongoDB C driver) contains a flaw in its SCRAM authentication implementation where the client continues the handshake and transmits the client proof even after detecting a nonce mismatch in the server's first message. An attacker with a man-in-the-middle position can inject a crafted s...

EUVD-2026-48304

Logto bypasses OIDC nonce validation when the nonce claim is absent from the idtoken, enabling replay of authentication tokens and weakening session-binding...

CVE-2026-15612 LOIDC nonce validation bypass

Logto bypasses OIDC nonce validation when the nonce claim is absent from the idtoken, enabling replay of authentication tokens and weakening session-binding...

CVE-2026-15612

The Logto identity platform contains an OIDC nonce validation bypass (CVE-2026-15612) within its core protocol handling. The vulnerability occurs because the system stores a nonce in the connector session but only performs a validation check if the nonce claim is present in the id_token. When an ...

PT-2024-38937 · WordPress · Tourfic

Name of the Vulnerable Software and Affected Versions: The Tourfic plugin for WordPress versions up to, and including, 2.11.20 Description: The issue is due to missing or incorrect nonce validation on several functions, including tf order status email resend function, tf visitor details edit...

WordPress Redux Framework <= 4.1.23 - Cross-Site Request Forgery (CSRF) Nonce Validation Bypass vulnerability

Cross-Site Request Forgery CSRF Nonce Validation Bypass vulnerability found by ErwanLR in WordPress Redux Framework versions 4.1.22 - 4.1.23. Solution Update the WordPress Redux Framework to the latest available version at least 4.1.24...

WordPress Contextual Related Posts plugin <= 2.9.3 - Cross-Site Request Forgery (CSRF) Nonce Validation Bypass vulnerability

Cross-Site Request Forgery CSRF Nonce Validation Bypass vulnerability found by Lenon Leite in WordPress Contextual Related Posts plugin versions = 2.9.3. Solution Update the WordPress Contextual Related Posts plugin to the latest available version at least 2.9.3...