HIGHVulnerability
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 authorization codes upon consent approval, and exchange them for access tokens to hijack MCP sessions.
Properties
- severity
- HIGH
- score
- 7.1
- cve_id
- CVE-2026-79786
- signal_observed_at
- 2026-09-23T22:44:39+00:00
- vector
- CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:L/A:N
- published_at
- 2026-08-25T19:16:54.750
- last_modified
- 2026-09-23T17:17:43.030
Related Entities (2)
HAS_WEAKNESS (1)
→[Weakness]URL Redirection to Untrusted Site ('Open Redirect')
DESCRIBED_BY (1)
→[Source]NVD
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