DEBIAN-CVE-2021-32677
- Source
- https://security-tracker.debian.org/tracker/CVE-2021-32677
- Import Source
- https://storage.googleapis.com/debian-osv/debian-cve-osv/DEBIAN-CVE-2021-32677.json
- JSON Data
- https://api.osv.dev/v1/vulns/DEBIAN-CVE-2021-32677
- Upstream
- Published
- 2021-06-09T18:15:08Z
- Modified
- 2026-09-01T20:04:28Z
- Severity
-
- 8.1 (High) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- [none]
- Details
-
FastAPI is a web framework for building APIs with Python 3.6+ based on standard Python type hints. FastAPI versions lower than 0.65.2 that used cookies for authentication in path operations that received JSON payloads sent by browsers were vulnerable to a Cross-Site Request Forgery (CSRF) attack. 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). A request with a content type of text/plain containing JSON data would be accepted and the JSON data would be extracted. Requests with content type text/plain are exempt from CORS preflights, for being considered Simple requests. The browser will 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. This is fixed in FastAPI 0.65.2. The request data is now parsed as JSON only if the content-type header is application/json or another JSON compatible media type like application/geo+json. It's best to upgrade to the latest FastAPI, but if updating is not possible then a middleware or a dependency that checks the content-type header and aborts the request if it is not application/json or another JSON compatible content type can act as a mitigating workaround.
- References
Affected packages
Debian:12 / fastapi
Package
- Name
- fastapi
- Purl
- pkg:deb/debian/fastapi?arch=source&distro=bookworm
Debian:13 / fastapi
Package
- Name
- fastapi
- Purl
- pkg:deb/debian/fastapi?arch=source&distro=trixie
Debian:14 / fastapi
Package
- Name
- fastapi
- Purl
- pkg:deb/debian/fastapi?arch=source&distro=forky