CVE-2026-86075

n8n , an open-source workflow automation platform, contains an unauthenticated storage exhaustion vulnerability in its OAuth Dynamic Client Registration endpoint. Prior to versions 2.37.7 and 2.38.2 , the endpoint properly bounded redirect_uris but accepted arbitrarily large client_name and grant...

CVE-2026-86075 n8n: Unauthenticated Persistent Storage Exhaustion via OAuth Dynamic Client Registration Endpoint

n8n is an open source workflow automation platform. Prior to 2.37.7 and 2.38.2, the OAuth Dynamic Client Registration endpoint bounded redirecturis but accepted arbitrarily large clientname and granttypes values. An unauthenticated remote caller could repeatedly persist oversized values in...

CVE-2026-79786

Coroot's unauthenticated MCP OAuth dynamic client registration endpoint accepts any syntactically valid redirect URI without validation, allowing attackers to register clients pointing to attacker-controlled hosts. Attackers can send authorization URLs to signed-in users, capture their...

CVE-2026-79786

Coroot versions 1.20.2 through 1.24.5 are affected by an unvalidated redirect URI in the MCP OAuth dynamic client registration endpoint. The endpoint accepts any syntactically valid redirect URI without validation, allowing an unauthenticated attacker to register a client pointing to an attacker-...

n8n Vulnerable to Unauthenticated Denial of Service via MCP Client Registration

Impact The MCP OAuth client registration endpoint accepted unauthenticated requests and stored client data without adequate resource controls. An unauthenticated remote attacker could exhaust server memory resources by sending large registration payloads, rendering the n8n instance unavailable. T...

OAuth Dynamic Client Registration Permissive Redirect URI

OAuth Dynamic Client Registration requires specifying redirect URIs during the registration process. When the OAuth server accepts permissive redirect URIs, such as those allowing arbitrary hosts or ones starting with javascript://, an attacker could exploit this to perform Open Redirect or...