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wire 2026-06-10
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FASTAPI CORE DEPENDENCIES ADVANCE, STARLETTE JUMPS TO 1.2.1

By RepoJournal · Filed · About FastAPI & Pydantic · Composed from the cited sources · methodology

dependabot[bot] alejsdev
2 people shipped this
dependabot[bot] @dependabot[bot] 4 cited alejsdev @alejsdev 1 cited

FastAPI's dependency stack is moving faster than usual: Starlette climbs two minor versions [ref:5], python-multipart patches a URL parsing fix [ref:4], and six supporting packages ship updates in a single sweep [ref:1].

The headline move is Starlette 1.2.1 [1], which swaps httpx for httpx2 in the testclient module. This matters because httpx2 2.3.0 [2] also ships in the same batch, meaning the upgrade is coordinated and tested together. Python-multipart 0.0.30 [3] tightens URL field separator handling to treat only ampersands as delimiters, a parsing fix that affects form handling. The broader dependency refresh [2] pulls in Ruff 0.15.15, Typer 0.26.6, and inline-snapshot 0.34.0 across the board. This is maintenance day, not a crisis. CI infrastructure also updates [4] with actions/checkout 6.0.3 to keep the build pipeline current.

$ ls fastapi/reviews/ # the step-back reads

the week in review Pydantic drops Python 3.10, then layers serialization fast paths the month in review Five Pydantic validation bypasses and a quadratic URL check
Full archive → Weekly reviews →

Quick answers

What shipped in FastAPI & Pydantic on June 10, 2026?
FastAPI's dependency stack is moving faster than usual: Starlette climbs two minor versions [ref:5], python-multipart patches a URL parsing fix [ref:4], and six supporting packages ship updates in a single sweep [ref:1]. In total, 1 commits and 6 pull requests landed.
Who contributed to FastAPI & Pydantic on June 10, 2026?
2 developers shipped this update, including dependabot[bot] and alejsdev.
What were the notable FastAPI & Pydantic updates?
⬆ Bump starlette from 1.1.0 to 1.2.1, ⬆ Bump the python-packages group across 1 directory with 6 updates, and ⬆ Bump python-multipart from 0.0.29 to 0.0.30.
♥

$ log FastAPI & Pydantic --recent

Pydantic fixes GC tracking in pydantic-core and caches UTC TzInfo 50 shipped Pydantic drops Python 3.10, accepts list and DecimalTuple for Decimal 37 shipped Pydantic reworks `TypeAdapter` call arguments, tightens `Decimal` schemas 13 shipped FastAPI bumps pillow and dnspython, Pydantic corrects arguments JSON Schema 6 shipped

$ log --all # elsewhere on the wire

Agent Security Quiet day in agent security as guard coverage reaches four clients Alignment & Post-training verl defaults Ascend RL mode, open-instruct unblocks SFT packing

$ ls showcases/

Safety Evals AI Red Teaming Agent Security Interpretability Alignment & Post-training

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