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Update dependency fastmcp to v3.4.7 - #14622

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This PR contains the following updates:

Package Change Age Confidence
fastmcp ==3.4.3 → ==3.4.7 age confidence

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Release Notes

PrefectHQ/fastmcp (fastmcp)

v3.4.7: : Know Your Audience

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FastMCP 3.4.7 restores CIMD private_key_jwt authentication for OAuthProxy deployments at a bare origin. Client assertions are now validated against the exact token endpoint advertised in authorization server metadata, eliminating the doubled-slash audience mismatch.

What's Changed
Security 🔒
Docs 📚

Full Changelog: PrefectHQ/fastmcp@v3.4.6...v3.4.7

v3.4.6: : Trust, but Proxy

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FastMCP 3.4.6 backports trusted-proxy support for SSRF-protected OAuth metadata and JWKS fetches. Deployments can now route these requests through a mandated corporate proxy while preserving custom CA certificates; FastMCP refuses the fetch when no proxy is configured instead of risking an unprotected direct request.

What's Changed

Fixes 🐞
Docs 📚

Full Changelog: PrefectHQ/fastmcp@v3.4.5...v3.4.6

v3.4.5: : Key Change

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FastMCP 3.4.5 collects five fixes for the 3.x line. The one that prompted it: a single Ed25519 key in a JWKS — which Rauthy, Ory Hydra, and some Keycloak configurations publish by default — made JWTVerifier reject every token, including ones correctly signed by supported keys in the same set.

What's Changed
Fixes 🐞
Docs 📚
New Contributors

Full Changelog: PrefectHQ/fastmcp@v3.4.4...v3.4.5

v3.4.4: : Host in Translation

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FastMCP 3.4.4 restores HTTP deployment compatibility after the 3.4.3 Host/Origin guard changed default behavior for existing ASGI, serverless, and reverse-proxy deployments. The guard implementation remains available for deployments that opt in with explicit trusted hosts and origins, while 3.x returns to accepting traffic that worked before the patch. This release also adds Hugging Face OAuth provider support, with docs and examples for public and private apps, PKCE, Dynamic Client Registration, and CIMD.

What's Changed

Enhancements ✨
Fixes 🐞
Docs 📚

New Contributors

Full Changelog: PrefectHQ/fastmcp@v3.4.3...v3.4.4


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@renovate-bot
renovate-bot requested review from a team as code owners October 1, 2026 17:43
@trusted-contributions-gcf trusted-contributions-gcf Bot added kokoro:force-run Add this label to force Kokoro to re-run the tests. owlbot:run Add this label to trigger the Owlbot post processor. labels Oct 1, 2026
@product-auto-label product-auto-label Bot added samples Issues that are directly related to samples. api: run Issues related to the Cloud Run API. labels Oct 1, 2026

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Code Review

This pull request updates the fastmcp dependency version from 3.4.3 to 3.4.7 in the pyproject.toml file for the MCP server. There are no review comments, and I have no additional feedback to provide.

@kokoro-team kokoro-team removed the kokoro:force-run Add this label to force Kokoro to re-run the tests. label Oct 1, 2026
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