Description


The Model Context Protocol Python SDK is the official Python SDK for Model Context Protocol servers and clients. From 1.8.0 until 1.30.0 and 2.2.0, streamable_http_client, streamablehttp_client, sse_client, ClientSessionGroup, OAuth, and create_mcp_http_client client paths enable follow_redirects and follow redirects to a different origin, forwarding caller-supplied custom credential headers and, for 307 or 308 responses, the request body. An attacker who can influence a trusted endpoint's redirect destination can receive that material. This issue is fixed in versions 1.30.0 and 2.2.0.

Related CPE's


Could not find any relations

Weaknesses



CWE-200

CVSS impact metrics


CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N

5.9 · Medium

Information


Source identifier

[email protected]

Vulnerability status

Deferred

Published

2026-10-27T20:17:13.493Z

20 hours ago

Last modified

2026-10-28T15:24:56.033Z

55 minutes ago