CVE-2026-47158: Cross-Site Request Forgery (CSRF)

Vaultwarden is a Bitwarden-compatible server written in Rust. Prior to 1.36.0, Vaultwarden's SSO authorization flow did not bind the OAuth state parameter accepted by /connect/authorize to the initiating browser session, allowed attacker-controlled PKCE parameters, and left SsoAuth records intact...

CVE-2026-58489

HedgeDoc is an open source, real-time collaborative markdown notes application. Prior to 1.11.0, the GitHub Gist export flow created an OAuth2 state value but only checked that it was present rather than validating it against the value expected for the user's session. Because the state was not...

CVE-2026-58489

HedgeDoc is an open source, real-time collaborative markdown notes application. Prior to 1.11.0, the GitHub Gist export flow created an OAuth2 state value but only checked that it was present rather than validating it against the value expected for the user's session. Because the state was not...

EUVD-2026-43576

HedgeDoc is an open source, real-time collaborative markdown notes application. Prior to 1.11.0, the GitHub Gist export flow created an OAuth2 state value but only checked that it was present rather than validating it against the value expected for the user's session. Because the state was not...

PYSEC-2026-2730 Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts

Summary The LDAP and OAuth authentication flows use a TOCTOU Time-of-Check-Time-of-Use pattern for first-user admin role assignment. The regular signup handler signuphandler in auths.py, line 663 was explicitly patched to prevent this race with the comment "Insert with default role first to avoid...

Open WebUI: LDAP and OAuth First-User Race Condition Allows Multiple Admin Accounts

SummaryThe LDAP and OAuth authentication flows use a TOCTOU Time-of-Check-Time-of-Use pattern for first-user admin role assignment. The regular signup handler signuphandler in auths.py, line 663 was explicitly patched to prevent this race with the comment "Insert with default role first to avoid...

FastMCP OAuth Proxy token reuse across MCP servers

While testing the OAuth Proxy implementation, it was noticed that the server does not properly respect the resource parameter submitted by the client in the authorization and token request. Instead of issuing the token explicitly for this MCP server, the token is issued for the baseurl passed to...

PT-2026-57920

Name of the Vulnerable Software and Affected Versions HedgeDoc versions prior to 1.11.0 Description The GitHub Gist export flow fails to properly validate the OAuth2 state value, checking only for its presence instead of verifying it against the user session. This allows an attacker to forge a...

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...

FastAPI Users Vulnerable to 1-click Account Takeover in Apps Using FastAPI SSO

DescriptionThe OAuth login state tokens are completely stateless and carry no per-request entropy or any data that could link them to the session that initiated the OAuth flow. generatestatetoken is always called with an empty statedata dict, so the resulting JWT only contains the fixed audience...

PYSEC-2026-1937 Spotipy has a XSS vulnerability in its OAuth callback server

Summary XSS vulnerability in OAuth callback server allows JavaScript injection through unsanitized error parameter. Attackers can execute arbitrary JavaScript in the user's browser during OAuth authentication. Details Vulnerable Code: spotipy/oauth2.py lines 1238-1274 RequestHandler.doGET The...

PYSEC-2026-1769 pgadmin4 is affected by a Cross-Origin Opener Policy (COOP) vulnerability

pgAdmin = 9.7 is affected by a Cross-Origin Opener Policy COOP vulnerability. This vulnerability allows an attacker to manipulate the OAuth flow, potentially leading to unauthorised account access, account takeover, data breaches, and privilege escalation...

pgadmin4 is affected by a Cross-Origin Opener Policy (COOP) vulnerability

pgAdmin = 9.7 is affected by a Cross-Origin Opener Policy COOP vulnerability.This vulnerability allows an attacker to manipulate the OAuth flow,potentially leading to unauthorised account access, account takeover, data breaches, and privilege escalation...

Nezha Monitoring: OAuth2 Redirect URL — Host Header Injection

Description The getRedirectURL function in oauth2.go:22-29 constructs the OAuth2 callback URL by concatenating the request's Host header with a fixed path, with zero validation of the Host header: go func getRedirectURLc gin.Context string scheme := "http://" referer := c.Request.Referer if...

CVE-2026-54030 LibreChat: Missing Resource Parameter Validation in MCP OAuth Flow

LibreChat is an enhanced ChatGPT clone that supports multiple AI providers. Prior to 0.8.5, LibreChat's MCP OAuth implementation does not validate that the resource parameter from OAuth Protected Resource metadata RFC 9728 matches the configured MCP server URL, allowing a malicious MCP server to...

PT-2026-52592

Name of the Vulnerable Software and Affected Versions Keycloak affected versions not specified Description A JWT algorithm confusion flaw exists in the JWT Authorization Grant flow. An attacker possessing valid client credentials can bypass signature verification by forging an assertion. This...

CVE-2026-55666

Rocket.Chat is an open-source, secure, fully customizable communications platform. Prior to 8.5.1, 8.4.4, 8.3.6, 8.2.6, 8.1.6, 8.0.7, and 7.10.13, in apps/meteor/app/apple/server/loginHandler.ts, handleIdentityToken parses a JWT issued by Apple during the OAuth flow. The try block checks for an...

CVE-2026-54305

CVE-2026-54305 affects n8n Enterprise instances using the Dynamic Credentials EE Endpoints. Prior to versions 1.123.55, 2.25.7, and 2.26.2, three Dynamic Credentials endpoints accepted any authenticated session without per-resource ownership or scope checks on the target workflow or credential. A...

CVE-2026-54305: Exposure of Sensitive Information to an Unauthorized Actor

n8n is an open source workflow automation platform. Prior to 1.123.55, 2.25.7, and 2.26.2, three EE endpoints used by the Dynamic Credentials feature accepted any authenticated n8n session without performing per-resource ownership or scope checks on the target workflow or credential. An...

CVE-2026-56425

The Azure Active Directory AAD authentication implementation contained multiple weaknesses in its OAuth 2.0 authorization flow that could allow attackers to bypass important security guarantees provided by the protocol. The application used the PHP session identifier sessionid as the OAuth state...