PT-2026-49089 · Unknown · Model Context Protocol
CVSS v4.0
9.4
Critical
| Vector | AV:N/AC:L/AT:N/PR:N/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/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 |
Name of the Vulnerable Software and Affected Versions
Model Context Protocol versions prior to 0.25.0
Description
Servers fail to validate the "Origin" header on incoming connections, which may allow DNS rebinding attacks. DNS rebinding is a method of bypassing the Same-Origin Policy to interact with services on a private network from a remote browser.
Recommendations
Update to version 0.25.0 or later and use the
--allowed-hosts or --allowed-origins flags to specify permitted hosts and origins at server startup.Exploit
Fix
Origin Validation Error
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Weakness Enumeration
Related Identifiers
Affected Products
Model Context Protocol