EUVD-2026-18849

OpenClaw before 2026.4.2 reuses the PKCE verifier as the OAuth state parameter in the Gemini OAuth flow, exposing it through the redirect URL. Attackers who capture the redirect URL can obtain both the authorization code and PKCE verifier, defeating PKCE protection and enabling token redemption...

CVE-2026-34511 OpenClaw < 2026.4.2 - PKCE Verifier Exposure via OAuth State Parameter

OpenClaw before 2026.4.2 reuses the PKCE verifier as the OAuth state parameter in the Gemini OAuth flow, exposing it through the redirect URL. Attackers who capture the redirect URL can obtain both the authorization code and PKCE verifier, defeating PKCE protection and enabling token redemption...

CVE-2026-34083

Signal K Server is a server application that runs on a central hub in a boat. Prior to version 2.24.0, SignalK Server contains a code-level vulnerability in its OIDC login and logout handlers where the unvalidated HTTP Host header is used to construct the OAuth2 redirecturi. Because the redirectU...

Signal K Server security vulnerability

The Signal K Server is an open-source marine central server developed by Signal K. Versions of the Signal K Server prior to 2.24.0 contained security vulnerabilities. These vulnerabilities stemmed from the use of unvalidated Host headers in constructing redirect URIs, which could lead to the thef...

GHSA-RWW4-4W9C-7733 FastMCP: Missing Consent Verification in OAuth Proxy Callback Facilitates Confused Deputy Vulnerabilities

Summary While testing the GitHubProvider OAuth integration, which allows authentication to a FastMCP MCP server via a FastMCP OAuthProxy using GitHub OAuth, it was discovered that the FastMCP OAuthProxy does not properly validate the user's consent upon receiving the authorization code from GitHu...

CVE-2026-32235

Backstage is an open framework for building developer portals. Prior to 0.27.1, the experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents a...

GHSA-WQVH-63MV-9W92 @backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass

Impact The experimental OIDC provider in @backstage/plugin-auth-backend is vulnerable to a redirect URI allowlist bypass. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configured allowedRedirectUriPatterns are affected. A specially crafte...

CVE-2026-25649

Traccar (open-source GPS tracking) up to version 6.11.1 is affected by CVE-2026-25649 due to an open redirect in two OIDC endpoints. The redirect_uri is not validated against a whitelist, enabling authenticated users to steal OAuth 2.0 authorization codes by steering them to attacker‑controlled U...

CVE-2026-25649 Traccar Vulnerable to Authorization Code Theft via Open Redirect in OIDC Provider Endpoints

Versions of the Traccar open-source GPS tracking system up to and including 6.11.1 contain an issue in which authenticated users can steal OAuth 2.0 authorization codes by exploiting an open redirect vulnerability in two OIDC-related endpoints. The redirecturi parameter is not validated against a...

CVE-2026-25649 Traccar Vulnerable to Authorization Code Theft via Open Redirect in OIDC Provider Endpoints

Versions of the Traccar open-source GPS tracking system up to and including 6.11.1 contain an issue in which authenticated users can steal OAuth 2.0 authorization codes by exploiting an open redirect vulnerability in two OIDC-related endpoints. The redirecturi parameter is not validated against a...

CVE-2023-6927: URL Redirection to Untrusted Site

A flaw was found in Keycloak. This issue may allow an attacker to steal authorization codes or tokens from clients using a wildcard in the JARM response mode "formpost.jwt" which could be used to bypass the security patch implemented to address CVE-2023-6134...

CVE-2022-39222

Dex is an identity service that uses OpenID Connect to drive authentication for other apps. Dex instances with public clients and by extension, clients accepting tokens issued by those Dex instances are affected by this vulnerability if they are running a version prior to 2.35.0. An attacker can...

ApiFest OAuth 2.0 Server has a vulnerability regarding input validation errors

ApiFest OAuth 2.0 Server is ApiFest open source an OAuth 2.0 protocol ApiFest OAuth 2.0 Server Java implementation . A security vulnerability exists in ApiFest OAuth 2.0 Server version 0.3.1, which stems from not validating the redirect URI according to RFC 6749, which can be exploited by an...

CVE-2020-7692

PKCE support is not implemented in accordance with the RFC for OAuth 2.0 for Native Apps. Without the use of PKCE, the authorization code returned by an authorization server is not enough to guarantee that the client that issued the initial authorization request is the one that will be authorized...