CVE-2026-79786
HIGH
NVD
CVSS Score
7.1
Severity
HIGH
Published
Aug 25, 2026
Vendor
unknown
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.