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Title: fix: add SSRF redirect protection to httpx client factory by dgenio · Pull Request #2180 · modelcontextprotocol/python-sdk · GitHub

Open Graph Title: fix: add SSRF redirect protection to httpx client factory by dgenio · Pull Request #2180 · modelcontextprotocol/python-sdk

X Title: fix: add SSRF redirect protection to httpx client factory by dgenio · Pull Request #2180 · modelcontextprotocol/python-sdk

Description: The official Python SDK for Model Context Protocol servers and clients - fix: add SSRF redirect protection to httpx client factory by dgenio · Pull Request #2180 · modelcontextprotocol/python-sdk

Open Graph Description: What changed Adds a RedirectPolicy enum and redirect validation event hook to create_mcp_http_client() in src/mcp/shared/_httpx_utils.py to protect against SSRF attacks via HTTP redirects. Changes:...

X Description: What changed Adds a RedirectPolicy enum and redirect validation event hook to create_mcp_http_client() in src/mcp/shared/_httpx_utils.py to protect against SSRF attacks via HTTP redirects. Changes:...

Opengraph URL: https://github.com/modelcontextprotocol/python-sdk/pull/2180

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February 28, 2026 13:28	https://github.com/modelcontextprotocol/python-sdk/pull/2180#commits-pushed-5423962
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fix: add SSRF redirect protection to httpx client factory	https://github.com/modelcontextprotocol/python-sdk/pull/2180/commits/542396228deef98f15756e4c2209953a46be35cc
5423962	https://github.com/modelcontextprotocol/python-sdk/pull/2180/commits/542396228deef98f15756e4c2209953a46be35cc
modelcontextprotocol#2106	https://github.com/modelcontextprotocol/python-sdk/issues/2106
	https://github.com/dgenio
fix: use Location header for redirect validation instead of next_request	https://github.com/modelcontextprotocol/python-sdk/pull/2180/commits/1f1efbd91481464f34838b4a74ebabca696066fd
1f1efbd	https://github.com/modelcontextprotocol/python-sdk/pull/2180/commits/1f1efbd91481464f34838b4a74ebabca696066fd
modelcontextprotocol#2106	https://github.com/modelcontextprotocol/python-sdk/issues/2106
	https://github.com/dgenio
fix: remove redirect_policy from McpHttpClientFactory Protocol	https://github.com/modelcontextprotocol/python-sdk/pull/2180/commits/6fc1bc724a813720f9eb69b0911a96470e6f8e29
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modelcontextprotocol#2106	https://github.com/modelcontextprotocol/python-sdk/issues/2106
	https://github.com/dgenio
docs: document SSRF redirect protection gap for user-provided clients	https://github.com/modelcontextprotocol/python-sdk/pull/2180/commits/06d1f1e5664b623d235cba0af6fc61187fb6e820
06d1f1e	https://github.com/modelcontextprotocol/python-sdk/pull/2180/commits/06d1f1e5664b623d235cba0af6fc61187fb6e820
modelcontextprotocol#2106	https://github.com/modelcontextprotocol/python-sdk/issues/2106
	https://github.com/dgenio
test: fix coverage gaps for relative redirect and unreachable mock br…	https://github.com/modelcontextprotocol/python-sdk/pull/2180/commits/75a4e4520f958e6f88acebc9bfbacfcde80507d5
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Jul 8, 2026	https://github.com/modelcontextprotocol/python-sdk/pull/2180#ref-pullrequest-4836556404
Scope HTTP client redirect following to the request's origin #3075	https://github.com/modelcontextprotocol/python-sdk/pull/3075
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Add SSRF protection for HTTP client redirects	https://github.com/modelcontextprotocol/python-sdk/issues/2106
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