CVE-2026-31951 LibreChat's MCP Server Header Injection Enables OAuth Token Theft

LibreChat is a ChatGPT clone with additional features. In versions 0.8.2-rc1 through 0.8.3-rc1, user-created MCP Model Context Protocol servers can include arbitrary HTTP headers that undergo credential placeholder substitution. An attacker can create a malicious MCP server with headers containin...

GHSA-364X-8G5J-X2PR n8n has XSS in its Credential Management Flow

Impact An authenticated user with permission to create and share credentials could craft a malicious OAuth2 credential containing a JavaScript URL in the Authorization URL field. If a victim opened the credential and interacted with the OAuth authorization button, the injected script would execut...

CVE-2021-27582

org/mitre/oauth2/web/OAuthConfirmationController.java in the OpenID Connect server implementation for MITREid Connect through 1.3.3 contains a Mass Assignment aka Autobinding vulnerability. This arises due to unsafe usage of the @ModelAttribute annotation during the OAuth authorization flow, in...

EUVD-2026-16563

Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and username is altered in passdb, then OTP credentials can be cached so that same OTP reply is valid. An attacker able to observe an OTP exchange is able to log in as the user. If...

ALPINE-CVE-2026-27855

Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and username is altered in passdb, then OTP credentials can be cached so that same OTP reply is valid. An attacker able to observe an OTP exchange is able to log in as the user. If...

CVE-2026-27855

Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and username is altered in passdb, then OTP credentials can be cached so that same OTP reply is valid. An attacker able to observe an OTP exchange is able to log in as the user. If...

CVE-2026-27855

Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and username is altered in passdb, then OTP credentials can be cached so that same OTP reply is valid. An attacker able to observe an OTP exchange is able to log in as the user. If...

CVE-2026-27855

Dovecot OTP authentication is vulnerable to a replay attack under specific conditions: if auth cache is enabled and the username is altered in passdb, OTP credentials can be cached so that the same OTP response remains valid. An attacker who observes an OTP exchange can log in as the targeted use...

PT-2026-56436

Name of the Vulnerable Software and Affected Versions n8n versions prior to 2.8.0 Description A cross-site scripting issue exists in the credential management flow. Authenticated users can inject malicious JavaScript URLs into the OAuth2 credential Authorization URL fields. This allows an attacke...

UBUNTU-CVE-2026-27855

Dovecot OTP authentication is vulnerable to replay attack under specific conditions. If auth cache is enabled, and username is altered in passdb, then OTP credentials can be cached so that same OTP reply is valid. An attacker able to observe an OTP exchange is able to log in as the user. If...

CVE-2026-3532

A flaw was found in the Drupal OpenID Connect / OAuth client. This vulnerability, stemming from improper handling of case sensitivity, allows an attacker to escalate their privileges. This could enable an unauthorized user to gain elevated access rights, potentially leading to unauthorized action...

CVE-2026-3531

A flaw was found in Drupal OpenID Connect / OAuth client. This authentication bypass vulnerability allows an attacker to bypass authentication by using an alternate path or channel. This can lead to unauthorized access to resources or functionalities protected by the authentication mechanism...

EUVD-2026-16387

Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect / OAuth client allows Authentication Bypass.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0...

EUVD-2026-16389

Improper Handling of Case Sensitivity vulnerability in Drupal OpenID Connect / OAuth client allows Privilege Escalation.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0...

EUVD-2026-16385

Server-Side Request Forgery SSRF vulnerability in Drupal OpenID Connect / OAuth client allows Server Side Request Forgery.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0...

CVE-2026-3530

Server-Side Request Forgery SSRF vulnerability in Drupal OpenID Connect / OAuth client allows Server Side Request Forgery.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0...

CVE-2026-3532

CVE-2026-3532 affects the Drupal OpenID Connect / OAuth client module. The Red Hat and related sources describe a flaw due to improper handling of case sensitivity that allows privilege escalation by manipulating user fields, potentially enabling unauthorized elevation of access for affected user...

CVE-2026-3532 OpenID Connect / OAuth client - Less critical - Access bypass - SA-CONTRIB-2026-027

Improper Handling of Case Sensitivity vulnerability in Drupal OpenID Connect / OAuth client allows Privilege Escalation.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0...

CVE-2026-3531

CVE-2026-3531 affects Drupal OpenID Connect / OAuth client prior to 1.5.0. The root cause is an authentication bypass via an alternate path or channel, enabling unauthorized access to resources protected by authentication. Public descriptions from Red Hat, ENISA/EUVD, NVD/NVD, CVE lists and the D...

CVE-2026-3531

Authentication Bypass Using an Alternate Path or Channel vulnerability in Drupal OpenID Connect / OAuth client allows Authentication Bypass.This issue affects OpenID Connect / OAuth client: from 0.0.0 before 1.5.0...