CVE-2026-67345

MaxKey through 4.1.12, fixed in commit ddbb72f, contains an insufficient redirect URI validation vulnerability in DefaultRedirectResolver.hostMatches that allows remote attackers to hijack OAuth 2.0 authorization codes by supplying a crafted redirecturi whose hostname suffix matches a registered...

EUVD-2026-51148

MaxKey through 4.1.12, fixed in commit ddbb72f, contains an insufficient redirect URI validation vulnerability in DefaultRedirectResolver.hostMatches that allows remote attackers to hijack OAuth 2.0 authorization codes by supplying a crafted redirecturi whose hostname suffix matches a registered...

CVE-2026-67345

MaxKey before 4.1.12 contains an insufficient redirect URI validation in DefaultRedirectResolver.hostMatches(), allowing remote attackers to hijack OAuth 2.0 authorization codes via a crafted redirect_uri whose hostname suffix matches a registered URI without proper dot-boundary anchoring. Attack...

CVE-2026-67345 MaxKey 4.1.12 DefaultRedirectResolver OAuth Authorization Code Theft

MaxKey through 4.1.12, fixed in commit ddbb72f, contains an insufficient redirect URI validation vulnerability in DefaultRedirectResolver.hostMatches that allows remote attackers to hijack OAuth 2.0 authorization codes by supplying a crafted redirecturi whose hostname suffix matches a registered...

CVE-2026-67345 MaxKey 4.1.12 DefaultRedirectResolver OAuth Authorization Code Theft

MaxKey through 4.1.12, fixed in commit ddbb72f, contains an insufficient redirect URI validation vulnerability in DefaultRedirectResolver.hostMatches that allows remote attackers to hijack OAuth 2.0 authorization codes by supplying a crafted redirecturi whose hostname suffix matches a registered...

EUVD-2026-38633

Poweradmin has Host Header Injection in OIDC redirecturi, SAML ACS/SLO URL, and Logout Redirect Construction...

CVE-2026-16615 Librest: weak random number generation in pkce implementation

A flaw was found in librest. The PKCE implementation for OAuth authorization uses the GRand function from the GLib API, a cryptographically insecure pseudo-random number generator. Because the generated "code verifier" lacks sufficient cryptographic entropy, a malicious actor can reverse-engineer...

CVE-2026-53518

Better Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint for the authorizationcode grant redeems a single-use authorization code through a non-atomic find-then-delete sequence, allowing two...

CVE-2026-53518 Better Auth OAuth Provider: Race Condition in Authorization Code Exchange Enables Multi-Use Code Redemption

Better Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint for the authorizationcode grant redeems a single-use authorization code through a non-atomic find-then-delete sequence, allowing two...

CVE-2026-53518 Better Auth OAuth Provider: Race Condition in Authorization Code Exchange Enables Multi-Use Code Redemption

Better Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint for the authorizationcode grant redeems a single-use authorization code through a non-atomic find-then-delete sequence, allowing two...

CVE-2026-53518

Better Auth is an authentication and authorization library for TypeScript. From 1.6.0 until 1.6.11, the @better-auth/oauth-provider POST /oauth2/token endpoint for the authorizationcode grant redeems a single-use authorization code through a non-atomic find-then-delete sequence, allowing two...

CVE-2026-53518

CVE-2026-53518 affects the Better Auth ecosystem, specifically the @better-auth/oauth-provider token endpoint for the authorization_code grant (and legacy paths via oidc-provider/mcp plugins). A race condition arises from a non-atomic find-then-delete when redeeming a single-use authorization cod...

PYSEC-2026-2476 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-2026-55672 ZITADEL: Missing client_id binding in OIDC authorization code exchange and refresh token flows (RFC 6749 Section 4.1.3 violation)

ZITADEL is an open source identity management platform. Prior to 3.4.12 and 4.15.2, ZITADEL's OAuth2 and OIDC CodeExchange, RefreshToken, and device token flows fail to verify that the requesting client matches the client that initiated the authorization flow, allowing intercepted grants or refre...

CVE-2026-55672

Summary (concrete details) : The CVE concerns Zitadel, an open-source identity management platform. The vulnerability occurs in the OAuth2/OIDC CodeExchange and RefreshToken flows (and related device token flow) where verification that the requesting client matches the originally authorized clien...

NPM: @better-auth/oauth-provider's OAuth authorization-code grant allows concurrent redemption when two token requests race the find-then-delete primitive

NPM: @better-auth/oauth-provider's OAuth authorization-code grant allows concurrent redemption when two token requests race the find-then-delete primitive vulnerability discovered by ? in WordPress Npm better-auth versions 1.6.11...

Time-of-check Time-of-use (TOCTOU) Race Condition

Overview @better-auth/oauth-provider is an An oauth provider plugin for Better Auth Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition through a race condition in the authorizationcode grant handler. An attacker can obtain multiple valid access,...

@better-auth/oauth-provider's OAuth authorization-code grant allows concurrent redemption when two token requests race the find-then-delete primitive

Am I affected? Users are affected if all of the following are true: - Their project depends on @better-auth/oauth-provider at a version = 1.6.0, = 1.4.8-beta.7, 1.6.0, or enables the legacy oidc-provider or mcp plugins from better-auth/plugins. - Their application exposes /api/auth/oauth2/token o...

Time-of-check Time-of-use (TOCTOU) Race Condition

Overview better-auth is a The most comprehensive authentication library for TypeScript. Affected versions of this package are vulnerable to Time-of-check Time-of-use TOCTOU Race Condition through a race condition in the authorizationcode grant handler. An attacker can obtain multiple valid access...

GHSA-7W99-5WM4-3G79 @better-auth/oauth-provider's OAuth authorization-code grant allows concurrent redemption when two token requests race the find-then-delete primitive

Am I affected? Users are affected if all of the following are true: - Their project depends on @better-auth/oauth-provider at a version = 1.6.0, = 1.4.8-beta.7, 1.6.0, or enables the legacy oidc-provider or mcp plugins from better-auth/plugins. - Their application exposes /api/auth/oauth2/token o...