CVE-2022-41919

Medium

Description

Fastify is a web framework with minimal overhead and plugin architecture. The attacker can use the incorrect `Content-Type` to bypass the `Pre-Flight` checking of `fetch`. `fetch()` requests with Content-Type’s essence as "application/x-www-form-urlencoded", "multipart/form-data", or "text/plain", could potentially be used to invoke routes that only accepts `application/json` content type, thus bypassing any CORS protection, and therefore they could lead to a Cross-Site Request Forgery attack. This issue has been patched in version 4.10.2 and 3.29.4. As a workaround, implement Cross-Site Request Forgery protection using `@fastify/csrf'.

SeverityMedium
CVSS4.2
Exploit probability35. percentile0.4%
ProductFastify
PublishedNov 22, 2022
First seenNov 22, 2022

How to fix

Update
  • fastify fastify3.29.4, 4.10.2 or later
  • fastify4.10.2, 3.29.4 or later

Affected products

ProductAffected versionsFixed in
fastify fastify3.0.0 ≤ v < 3.29.4, 4.0.0 ≤ v < 4.10.23.29.4, 4.10.2
fastifynpm4.0.0 ≤ v < 4.10.2, 3.0.0 ≤ v < 3.29.44.10.2, 3.29.4

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