VULNERABILITY INTELLIGENCE

CVE-2026-79786

CVSS score7.1 HIGH

EPSS probability0.39%

CISA KEVNot currently listed

Published2026-08-25

Last modified2026-09-23

Description

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 authorization codes upon consent approval, and exchange them for access tokens to hijack MCP sessions.