CVE-2026-79786

HighCVSS 7.1/10Last modified Sep 23, 2026

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.

Metrics

CVSS 3.1 7.1/10CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N

Weakness enumeration

CWE-601

Affected software

No affected versions have been published.

Timeline

Published: Aug 25, 2026
Last modified: Sep 23, 2026
NVD status: Deferred

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