VULNERABILITY INTELLIGENCE
CVE-2026-79786
CVSS score7.1 HIGH
EPSS probability0.39%
CISA KEVNot currently listed
Published2026-08-25
Last modified2026-09-23
CVSS vectorCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
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.
Weakness classification
- disclosure@vulncheck.com: CWE-601