SUSE CVE-2026-50572

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HTTP external-authorization client can retain a stale request callback after a request is rejected. When RawHttpClientImpl::onSuccess later processes the...

CVE-2026-50572: Use After Free

Envoy is an open source edge and service proxy designed for cloud-native applications. Prior to 1.36.10, 1.37.6, 1.38.4, and 1.39.1, Envoy's HTTP external-authorization client can retain a stale request callback after a request is rejected. When RawHttpClientImpl::onSuccess later processes the...

CVE-2026-17023

The Salon Booking System WordPress plugin through 10.30.33 does not perform any capability check or validate an OAuth state value on its Google Calendar authorization callback, which is also hooked for unauthenticated users, allowing an unauthenticated attacker to overwrite the site's stored Goog...

EUVD-2026-51810

better-auth before 1.6.13 and pre-release builds 1.7.0-beta.0 through 1.7.0-beta.3 fail to validate the scheme of redirecturis registered via the deprecated oidc-provider plugin and the mcp plugin which wraps the same provider. An attacker can register an OAuth client with a javascript:...

RabbitMQ 3.13.x < 3.13.15 / 4.0.x < 4.0.20 / 4.1.x < 4.1.11 / 4.2.x < 4.2.6 Multiple Vulnerabilities

The version of RabbitMQ installed on the remote host is affected by multiple vulnerabilities: - AMQP 0-9-1, AMQP 1.0, and Stream Protocol authentication can allow a loopback-restricted user such as guest to connect remotely when traffic is accepted through a trusted PROXY-protocol path and the...

CVE-2026-57219

RabbitMQ is a messaging and streaming broker. Prior to 3.13.15, 4.0.20, 4.1.11, and 4.2.6, the obsolete GET /api/auth endpoint can disclose the OAuth 2 client secret on RabbitMQ installations configured with management.oauthclientsecret, exposing credentials to unauthenticated callers when the...

CVE-2026-57807 WordPress OAuth Single Sign On - SSO (OAuth Client) plugin <= 38.5.8 - Broken Authentication vulnerability

Authentication Bypass Using an Alternate Path or Channel vulnerability in miniOrange Security Software Pvt Ltd. OAuth Single Sign On - SSO OAuth Client allows Password Recovery Exploitation. This issue affects OAuth Single Sign On - SSO OAuth Client: from n/a through 38.5.8...

PT-2026-57307

Name of the Vulnerable Software and Affected Versions miniOrange OAuth Single Sign On - SSO OAuth Client versions prior to 38.5.9 Description An authentication bypass exists in the miniOrange OAuth SSO WordPress plugin. An unauthenticated remote attacker can exploit an alternate password-recovery...

OAuth2::Client#request: Protocol-relative redirect Location overrides authority, leaking bearer Authorization to attacker host

Summary When an application uses OAuth2::Client typically via an OAuth2::AccessToken and the configured authorization server returns a redirect whose Location header is a protocol-relative URI of the form //attacker.example/leak, OAuth2::Clientrequest resolves the redirect with...

CVE-2026-42235

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an unauthenticated attacker could register a malicious MCP OAuth client with a crafted clientname. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that...

CVE-2026-42235

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an unauthenticated attacker could register a malicious MCP OAuth client with a crafted clientname. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that...

EUVD-2026-27110

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, an unauthenticated attacker could register a malicious MCP OAuth client with a crafted clientname. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that...

CVE-2026-42235

CVE-2026-42235 affects the n8n open-source workflow automation platform. An unauthenticated attacker could register a malicious MCP OAuth client with a crafted client_name. If a victim user approves the OAuth consent and another user later revokes that access, a toast renders the injected script,...

n8n Vulnerable to XSS via MCP OAuth client

Impact An unauthenticated attacker could register a malicious MCP OAuth client with a crafted clientname. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that access, a toast notification would render the injected script. Clicking the link would execute...

GHSA-537J-GQPC-P7FQ n8n Vulnerable to XSS via MCP OAuth client

Impact An unauthenticated attacker could register a malicious MCP OAuth client with a crafted clientname. If a victim user authorized the OAuth consent dialog and a second user subsequently revoked that access, a toast notification would render the injected script. Clicking the link would execute...

PT-2026-36905

Name of the Vulnerable Software and Affected Versions n8n versions prior to 1.123.32 n8n versions prior to 2.17.4 n8n versions prior to 2.18.1 Description An unauthenticated attacker can register a malicious MCP OAuth client using a crafted client name. If a victim user authorizes the OAuth conse...

CVE-2026-3530

A flaw was found in the Drupal OpenID Connect / OAuth client. This Server-Side Request Forgery SSRF vulnerability allows a remote attacker to trick the server into making unauthorized requests to internal or external resources. This could lead to the disclosure of sensitive information or enable...

GHSA-C2JP-C369-7PVX FastMCP Auth Integration Allows for Confused Deputy Account Takeover

Summary FastMCP documentation covers the scenario where it is possible to use Entra ID or other providers for authentication. In this context, because Entra ID does not support Dynamic Client Registration DCR, the FastMCP-hosted MCP server is acting as the authorization provider, as declared in t...

FastMCP Auth Integration Allows for Confused Deputy Account Takeover

Summary FastMCP documentation covers the scenario where it is possible to use Entra ID or other providers for authentication. In this context, because Entra ID does not support Dynamic Client Registration DCR, the FastMCP-hosted MCP server is acting as the authorization provider, as declared in t...

Linux Distros Unpatched Vulnerability : CVE-2021-39881

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available. - In all versions of GitLab CE/EE since version 7.7, the application may let a malicious user create an OAuth client application with arbitrary scope names which...