🔒 Check Content-Type request header before assuming JSON. Initial PR #2118 by @patrickkwang.
This change fixes a CSRF security vulnerability when using cookies for authentication in path operations with JSON payloads sent by browsers.
In versions lower than 0.65.2, FastAPI would try to read the request payload as JSON even if the content-type header sent was not set to application/json or a compatible JSON media type (e.g. application/geo+json).
So, a request with a content type of text/plain containing JSON data would be accepted and the JSON data would be extracted.
But requests with content type text/plain are exempt from CORS preflights, for being considered Simple requests. So, the browser would execute them right away including cookies, and the text content could be a JSON string that would be parsed and accepted by the FastAPI application.
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Bumps fastapi from 0.65.1 to 0.65.2.
Release notes
Sourced from fastapi's releases.
Commits
4d91f97🔖 Release version 0.65.2aabe2c7📝 Update release notes377234a🔒 Create Security Policy38b7858📝 Update release notesfa7e3c9🐛 Check Content-Type request header before assuming JSON (#2118)90120dd📝 Update release notes3677254🔧 Update sponsors badge, course bundle (#3340)40bb0c5📝 Update release notes60918d2🔧 Add new gold sponsor Jina 🎉 (#3291)3afce2c📝 Update release notesDependabot will resolve any conflicts with this PR as long as you don't alter it yourself. You can also trigger a rebase manually by commenting
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