CVE-2026-50287

HIGH

Missing Authentication for Critical Function in @agenticmail/mcp

Title source: cna
STIX 2.1

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.

References (1)

Core 1
Core References

Scores

CVSS v4 8.7
EPSS 0.0036
EPSS Percentile 27.5%
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X

CISA SSVC

Vulnrichment
Exploitation poc
Automatable yes
Technical Impact partial

Details

CWE
CWE-306
Status published
Products (2)
agenticmail/agenticmail < 0.9.27
agenticmail/mcp 0 - 0.9.27npm
Published Jun 12, 2026
Tracked Since Jun 13, 2026