CVE-2026-50287
High
Description
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.
SeverityHigh
CVSS8.7
Exploit probability—
Product@agenticmail/mcp
PublishedJun 12, 2026
First seenJun 12, 2026
Weakness typeCWE-306Missing authentication for critical function
How to fix
Update
- @agenticmail/mcp0.9.27 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| @agenticmail/mcpnpm | v < 0.9.27 | 0.9.27 |
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