n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution

Impact The OAuth token endpoint bound an authorization code's first access token to the consented resource, but not its refresh token. Refreshing only checked that the requested resource was registered, not that it matched the original grant. An OAuth client approved for one workflow could refres...

NPM: n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution

NPM: n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution vulnerability discovered by ? in WordPress Npm n8n versions 2.37.7...

CVE-2026-86073 n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.1, the OAuth token endpoint bound an authorization code's first access token to the consented resource but did not bind its refresh token. Refreshing checked only that the requested resource was registered, not that it...

CVE-2026-86073 n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.1, the OAuth token endpoint bound an authorization code's first access token to the consented resource but did not bind its refresh token. Refreshing checked only that the requested resource was registered, not that it...

CVE-2026-86073 n8n: Per-Resource OAuth Consent Bypass via Unbound Refresh Token Resource Substitution

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.1, the OAuth token endpoint bound an authorization code's first access token to the consented resource but did not bind its refresh token. Refreshing checked only that the requested resource was registered, not that it...

CVE-2026-86073

n8n , an open source workflow automation platform, is affected by a per-resource OAuth consent bypass prior to versions 2.37.7 and 2.38.1 . The OAuth token endpoint bound the initial access token to the consented resource but did not bind the refresh token ; upon refreshing, it only verified the ...

CVE-2026-66001 Frappe: Improper Authorization in OAuth2 Consent Endpoint

Frappe is a full-stack web application framework. Prior to 15.114.0 and 16.26.0, the approve and authorize functions in frappe/integrations/oauth2.py allow the OAuth2 consent flow to proceed without restricting approve to POST, without a csrftoken in...

Sensitive Cookie with Improper SameSite Attribute

Overview Affected versions of this package are vulnerable to Sensitive Cookie with Improper SameSite Attribute through the server default configuration and OAuth2/OIDC consent flow in serverdefaults.properties, ConsentRequiredResource, and CsrfProtection. An attacker can steal or abuse an...

PT-2026-76567

Summary Description An Insecure Default Initialization of Resource CWE-1188 issue in the OpenAM default configuration ships the iPlanetDirectoryPro SSO cookie with HttpOnly=false. Also, the iPlanetDirectoryPro SSO cookie is used as a CSRF token in OAuth/OIDC flows. This affects OpenAM Community...

CVE-2026-67333 better-auth before 1.6.13 Stored XSS via javascript redirect_uri

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:...

CVE-2026-67333

CVE-2026-67333 concerns the app/tooling package better-auth (versions before 1.6.13 and pre-release 1.7.0-beta.0–beta.3) and incorrect validation of the scheme for redirect_uris registered via the deprecated oidc-provider and the wrapped mcp plugin. An attacker can register an OAuth client with a...

The New Phishing Click: How OAuth Consent Bypasses MFA

In February 2026, a phishing-as-a-service PhaaS platform called EvilTokens went live. Within five weeks, it had compromised more than 340 Microsoft 365 organizations across five countries. The targets of the platform received a message asking them to enter a short code at microsoft.com/devicelogi...

CVE-2026-42230 n8n: Open Redirect in MCP OAuth Consent Flow

n8n is an open source workflow automation platform. Prior to versions 1.123.32, 2.17.4, and 2.18.1, the /mcp-oauth/register endpoint accepted OAuth client registrations without authentication, allowing arbitrary redirecturi values to be registered. When a user denies the MCP OAuth consent dialog,...

CVE-2026-32111

ha-mcp is a Home Assistant MCP Server. Prior to 7.0.0, the ha-mcp OAuth consent form beta feature accepts a user-supplied haurl and makes a server-side HTTP request to haurl/api/config with no URL validation. An unauthenticated attacker can submit arbitrary URLs to perform internal network...

CVE-2026-32235

An allowlist bypass flaw has been discovered in the npm @backstage/plugin-auth-backend package. Instances that have enabled experimental Dynamic Client Registration or Client ID Metadata Documents and configured allowedRedirectUriPatterns are affected. A specially crafted redirect URI can pass th...

ha-mcp has XSS via Unescaped HTML in OAuth Consent Form

Summary The ha-mcp OAuth consent form renders user-controlled parameters via Python f-strings with no HTML escaping. An attacker who can reach the OAuth endpoint and convince the server operator to follow a crafted authorization URL could execute JavaScript in the operator's browser. This affects...

EUVD-2026-11383

ha-mcp OAuth 2.1 DCR mode enables network reconnaissance via an error oracle...

Server-side Request Forgery (SSRF)

Overview ha-mcp is a Home Assistant MCP Server - Complete control of Home Assistant through MCP Affected versions of this package are vulnerable to Server-side Request Forgery SSRF via the haurl parameter in the OAuth consent form and forged tokens in REST and WebSocket tool calls. An attacker ca...

CVE-2026-32235: URL Redirection to Untrusted Site

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...

CVE-2026-32112

ha-mcp is a Home Assistant MCP Server. Prior to 7.0.0, the ha-mcp OAuth consent form renders user-controlled parameters via Python f-strings with no HTML escaping. An attacker who can reach the OAuth endpoint and convince the server operator to follow a crafted authorization URL could execute...