Race Condition

Overview open-webui is an Open WebUI Affected versions of this package are vulnerable to Race Condition through a race condition in the LDAP and OAuth authentication processes. An attacker can obtain administrative privileges by sending multiple concurrent authentication requests during the initi...

n8n Has a Cross-user Authorization Bypass in Dynamic Credential OAuth Endpoints

Impact The OAuth1 and OAuth2 credential reconnect endpoints authorized access using credential:read rather than credential:update. An authenticated user with read-only access to a shared credential could initiate an OAuth reconnect flow and overwrite the stored token material for that credential...

n8n 跨站脚本漏洞

n8n is an open-source, scalable workflow automation tool developed by n8n. Versions of n8n prior to 1.123.32, 2.17.4, and 2.18.1 contained cross-site scripting vulnerabilities. These vulnerabilities stemmed from unauthorized attackers who could register malicious MCP OAuth clients containing a...

PYSEC-2026-25

Authlib is a Python library which builds OAuth and OpenID Connect servers. Prior to 1.6.11, there is no CSRF protection on the cache feature in authlib.integrations.starletteclient.OAuth. This vulnerability is fixed in 1.6.11...

PT-2026-34579

In Rocket.Chat 8.3.0, 8.2.1, 8.1.2, 8.0.3, 7.13.5, 7.12.6, 7.11.6, and 7.10.9, a NoSQL injection vulnerability can lead to account takeover of the first user with a generated token when an OAuth app is configured...

Cross-site Scripting (XSS)

Overview Affected versions of this package are vulnerable to Cross-site Scripting XSS in the GitHub OAuth callback handler when the refreshInterval query parameter is embedded verbatim into an error message and rendered unescaped into HTML. An attacker can execute arbitrary JavaScript in the...

CVE-2026-4828

Improper authentication in the OAuth login functionality in Devolutions Server 2026.1.11 and earlier allows a remote attacker with valid credentials to bypass multi-factor authentication via a crafted login request...

Tinyauth has OAuth account confusion via shared mutable state on singleton service instances

Summary All three OAuth service implementations GenericOAuthService, GithubOAuthService, GoogleOAuthService store PKCE verifiers and access tokens as mutable struct fields on singleton instances shared across all concurrent requests. When two users initiate OAuth login for the same provider...

CVE-2026-4828

Summary (CVE-2026-4828) : Devolutions Server prior to 2026.1.12 is affected by an improper authentication flaw in the OAuth login flow that enables a remote attacker with valid credentials to bypass MFA via a crafted login request. Affected versions include 2026.1.11 and earlier. The issue is mit...

CVE-2026-34215 Parse Server: Auth data exposed via verify password endpoint

Parse Server is an open source backend that can be deployed to any infrastructure that can run Node.js. Prior to versions 8.6.63 and 9.7.0-alpha.7, the verify password endpoint returns unsanitized authentication data, including MFA TOTP secrets, recovery codes, and OAuth access tokens. An attacke...

PT-2026-28610

Name of the Vulnerable Software and Affected Versions Parse Server versions prior to 8.6.63 Parse Server versions prior to 9.7.0-alpha.7 Description The verify password endpoint returns unsanitized authentication data, including MFA TOTP secrets, recovery codes, and OAuth access tokens. An attack...

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-2026-33720 n8n Has Authorization Bypass in OAuth Callback via N8N_SKIP_AUTH_ON_OAUTH_CALLBACK

n8n is an open source workflow automation platform. Prior to version 2.8.0, when the N8NSKIPAUTHONOAUTHCALLBACK environment variable is set to true, the OAuth callback handler skips ownership verification of the OAuth state parameter. This allows an attacker to trick a victim into completing an...

EUVD-2026-13684

An attacker can extract user email addresses PII exposed in base64 encoding via the state parameter in the OAuth callback URL...

EUVD-2025-208759

FastMCP OAuth Proxy token reuse across MCP servers...

CVE-2026-31944

LibreChat is a ChatGPT clone with additional features. From 0.8.2 to 0.8.2-rc3, The MCP Model Context Protocol OAuth callback endpoint accepts the redirect from the identity provider and stores OAuth tokens for the user who initiated the flow, without verifying that the browser hitting the redire...

PT-2026-25366

LibreChat is a ChatGPT clone with additional features. From 0.8.2 to 0.8.2-rc3, The MCP Model Context Protocol OAuth callback endpoint accepts the redirect from the identity provider and stores OAuth tokens for the user who initiated the flow, without verifying that the browser hitting the redire...

GHSA-XG2Q-62G2-CVCM Tinyauth's OIDC authorization codes are not bound to client on token exchange

Summary The OIDC token endpoint does not verify that the client exchanging an authorization code is the same client the code was issued to. A malicious OIDC client operator can exchange another client's authorization code using their own client credentials, obtaining tokens for users who never...

EUVD-2026-11671

@backstage/plugin-auth-backend: OAuth redirect URI allowlist bypass...

CVE-2026-29792

Feathersjs (v5.0.0–5.0.41) is vulnerable to an unauthenticated bypass in the OAuth callback endpoint. A forged profile sent via the query string to /oauth/:provider/callback can trigger a fallback path that reads params.query when Grant’s session/state is empty, allowing an attacker to drive enti...