GHSA-9c5c-9qcx-q35q: @nestjs/platform-fastify

Package	Ecosystem	Affected	Fixed in
@nestjs/platform-fastify	npm	<11.2.4 \|\| >=12.0.0, <12.0.2	11.2.4, 12.0.2

Machine-written summary

Summary written by Claude Haiku from the source advisory. Not reviewed by a person.

Versions of @nestjs/platform-fastify below 11.2.4, and from 12.0.0 before 12.0.2, let a request with an absolute-form request target reach route handlers without running path-scoped middleware. A client that can send raw HTTP requests can thereby skip middleware such as authentication or authorization checks. Upgrade to 11.2.5 or 12.0.3, which the source recommends.

Written 31 Oct 2026.

Not analysed yet

We haven’t published our analysis of this Advisory yet. Once a person has reviewed it, this page will say what’s vulnerable, what has to be true for your app to be affected, and how to check.

Severity and exploitation

Score	Rating	CVSS	Vector	Source
7.4	High	3.1	CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N	GitHub Advisory Database

CISA KEV Not listed.
EPSS No score.

Timeline

31 Oct 2026, 13:34 UTC First seen by agentprime
31 Oct 2026, 13:34 UTC Confirmed by OSV

Sources

Facts on this page come from the GitHub Advisory Database (CC-BY 4.0), OSV and the other sources listed, as published. We don’t reproduce full advisory descriptions, which can contain exploit code.