CVE-2026-50287 HIGH

CVE-2026-50287: Missing Authentication for Critical Function in @agenticmail/mcp

Vendor Agenticmail
Product agenticmail
Weakness CWE-306 · Missing auth
Published June 12, 2026
Last update June 15, 2026
View on NVD All CVEs

CVSS base score

8.7/10
Attack vector Network
Attack complexity Low
Privileges required None
User interaction None
Confidentiality —
Integrity —

CVSS vector

CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N

What the vulnerability does

01Description

AgenticMail gives AI agents real email addresses and phone numbers. Prior to version 0.9.27, @agenticmail/mcp exposes a Streamable HTTP transport when started with --http or MCP_HTTP=1. In that mode, the /mcp endpoint accepts requests without any HTTP authentication layer. A remote client can initialize a session and call tools directly. This issue has been patched in version 0.9.27.

Key dates

02Disclosure timeline

June 12, 2026 CVE published
June 15, 2026 Record updated