chore(deps): Update dependency starlette to v0.47.2 [SECURITY]

[renovate-bot]

This PR contains the following updates:

Package	Change	Age	Confidence
starlette (changelog)	==0.41.2 -> ==0.47.2

GitHub Vulnerability Alerts

CVE-2025-54121

Summary

When parsing a multi-part form with large files (greater than the default max spool size) starlette will block the main thread to roll the file over to disk. This blocks the event thread which means we can't accept new connections.

Details

Please see this discussion for details: https://github.com/encode/starlette/discussions/2927#discussioncomment-13721403. In summary the following UploadFile code (copied from here) has a minor bug. Instead of just checking for self._in_memory we should also check if the additional bytes will cause a rollover.

    @​property
    def _in_memory(self) -> bool:
        # check for SpooledTemporaryFile._rolled
        rolled_to_disk = getattr(self.file, "_rolled", True)
        return not rolled_to_disk

    async def write(self, data: bytes) -> None:
        if self.size is not None:
            self.size += len(data)

        if self._in_memory:
            self.file.write(data)
        else:
            await run_in_threadpool(self.file.write, data)

I have already created a PR which fixes the problem: https://github.com/encode/starlette/pull/2962

PoC

See the discussion here for steps on how to reproduce.

Impact

To be honest, very low and not many users will be impacted. Parsing large forms is already CPU intensive so the additional IO block doesn't slow down starlette that much on systems with modern HDDs/SSDs. If someone is running on tape they might see a greater impact.

---

Release Notes

encode/starlette (starlette)

v0.47.2

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Fixed

• Make UploadFile check for future rollover #​2962.

---

New Contributors

• @​HonakerM made their first contribution in https://github.com/encode/starlette/pull/2962

Full Changelog: Kludex/starlette@0.47.1...0.47.2

v0.47.1: Version 0.47.1

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Fixed

• Use Self in TestClient.__enter__ #​2951
• Allow async exception handlers to type-check #​2949

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Full Changelog: Kludex/starlette@0.47.0...0.47.1

v0.47.0: Version 0.47.0

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Added

• Add support for ASGI pathsend extension #​2671.
• Add partitioned attribute to Response.set_cookie #​2501.

Changed

• Change methods parameter type from list[str] to Collection[str] #​2903.
• Replace import typing by from typing import ... in the whole codebase #​2867.

Fixed

• Mark ExceptionMiddleware.http_exception as async to prevent thread creation #​2922.

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New Contributors

• @​danlapid made their first contribution in https://github.com/encode/starlette/pull/2922
• @​Flecart made their first contribution in https://github.com/encode/starlette/pull/2501
• @​AllenSH12 made their first contribution in https://github.com/encode/starlette/pull/2936
• @​waketzheng made their first contribution in https://github.com/encode/starlette/pull/2867
• @​jonathanberthias made their first contribution in https://github.com/encode/starlette/pull/2903

Full Changelog: Kludex/starlette@0.46.2...0.47.0

v0.46.2: Version 0.46.2

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What's Changed

• Use correct index on backwards compatible logic in TemplateResponse by @​alex-oleshkevich in https://github.com/encode/starlette/pull/2909
• Prevents reraising of exception from BaseHTTPMiddleware by @​ramannanda9 in https://github.com/encode/starlette/pull/2911

New Contributors

• @​ahryniv made their first contribution in https://github.com/encode/starlette/pull/2913
• @​ramannanda9 made their first contribution in https://github.com/encode/starlette/pull/2911

Full Changelog: Kludex/starlette@0.46.1...0.46.2

v0.46.1: Version 0.46.1

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Fixed

• Allow relative directory path when follow_symlinks=True #​2896.

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Full Changelog: Kludex/starlette@0.46.0...0.46.1

v0.46.0: Version 0.46.0

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Added

• GZipMiddleware: Make sure Vary header is always added if a response can be compressed #​2865.

Fixed

• Raise exception from background task on BaseHTTPMiddleware #​2812.
• GZipMiddleware: Don't compress on server sent events #​2871.

Changed

• MultiPartParser: Rename max_file_size to spool_max_size #​2780.

Deprecated

• Add deprecated warning to TestClient(timeout=...) #​2840.

New Contributors

• @​musicinmybrain made their first contribution in https://github.com/encode/starlette/pull/2855
• @​WilliamDEdwards made their first contribution in https://github.com/encode/starlette/pull/2870
• @​mattmess1221 made their first contribution in https://github.com/encode/starlette/pull/2865

Full Changelog: Kludex/starlette@0.45.3...0.46.0

v0.45.3: Version 0.45.3

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Fixed

• Turn directory into string on lookup_path on commonpath comparison by @​Kludex in https://github.com/encode/starlette/pull/2851

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Full Changelog: Kludex/starlette@0.45.2...0.45.3

v0.45.2: Version 0.45.2

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Fixed

• Make create_memory_object_stream compatible with old anyio versions once again, and bump anyio minimum version to 3.6.2 by @​graingert in #​2833.

Full Changelog: Kludex/starlette@0.45.1...0.45.2

v0.45.1: Version 0.45.1

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Fixed

• Collect errors more reliably from WebSocket test client by @​graingert in https://github.com/encode/starlette/pull/2814
• Fix unclosed MemoryObjectReceiveStream upon exception in BaseHTTPMiddleware children by @​Kludex in https://github.com/encode/starlette/pull/2813

Refactor

• Use a pair of memory object streams instead of two queues by @​graingert in https://github.com/encode/starlette/pull/2829

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Full Changelog: Kludex/starlette@0.45.0...0.45.1

v0.45.0: Version 0.45.0

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Removed

• Drop Python 3.8 by @​Kludex in https://github.com/encode/starlette/pull/2823
• Remove ExceptionMiddleware import proxy from starlette.exceptions module by @​Kludex in https://github.com/encode/starlette/pull/2826
• Remove deprecated WS_1004_NO_STATUS_RCVD and WS_1005_ABNORMAL_CLOSURE by @​Kludex in https://github.com/encode/starlette/pull/2827

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Full Changelog: Kludex/starlette@0.44.0...0.45.0

v0.44.0: Version 0.44.0

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Added

• Add max_part_size parameter to Request.form() by @​iudeen in https://github.com/encode/starlette/pull/2815
• Add client parameter to TestClient by @​iudeen in https://github.com/encode/starlette/pull/2810

New Contributors

• @​iudeen made their first contribution in https://github.com/encode/starlette/pull/2815

Full Changelog: Kludex/starlette@0.43.0...0.44.0

v0.43.0: Version 0.43.0

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Removed

• Remove deprecated allow_redirects argument from TestClient #​2808.

Added

• Make UUID path parameter conversion more flexible #​2806.

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New Contributors

• @​AbduazizZiyodov made their first contribution in https://github.com/encode/starlette/pull/2799
• @​edthrn made their first contribution in https://github.com/encode/starlette/pull/2806

Full Changelog: Kludex/starlette@0.42.0...0.43.0

v0.42.0: Version 0.42.0

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Added

• Raise ClientDisconnect on StreamingResponse #​2732.

Fixed

• Use ETag from headers when parsing If-Range in FileResponse #​2761.
• Follow directory symlinks in StaticFiles when follow_symlinks=True #​2711.
• Bump minimum python-multipart version to 0.0.18 0ba8395.
• Bump minimum httpx version to 0.27.0 #​2773.

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New Contributors

• @​logan-connolly made their first contribution in https://github.com/encode/starlette/pull/2763
• @​eltoder made their first contribution in https://github.com/encode/starlette/pull/2768
• @​hanxi made their first contribution in https://github.com/encode/starlette/pull/2711
• @​viccie30 made their first contribution in https://github.com/encode/starlette/pull/2761
• @​dbowring made their first contribution in https://github.com/encode/starlette/pull/2782
• @​lealre made their first contribution in https://github.com/encode/starlette/pull/2793

Full Changelog: Kludex/starlette@0.41.3...0.42.0

v0.41.3: Version 0.41.3

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Fixed

• Exclude the query parameters from the scope[raw_path] on the TestClient #​2716.
• Replace dict by Mapping on HTTPException.headers #​2749.
• Correct middleware argument passing and improve factory pattern #​2752.

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Full Changelog: Kludex/starlette@0.41.2...0.41.3

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