fastify 5.7.1 vulnerabilities

Direct Vulnerabilities

Known vulnerabilities in the fastify package. This does not include vulnerabilities belonging to this package’s dependencies.

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Vulnerability	Vulnerable Version
H Interpretation Conflict fastify is an overhead web framework, for Node.js. Affected versions of this package are vulnerable to Interpretation Conflict via the `Content-Type` header processing. An attacker can bypass body validation by appending a tab character (`\t`) and arbitrary content to the `Content-Type` header, causing the server to treat the body as the intended type without enforcing validation rules. Note: This vulnerability affects all Fastify users who rely on Content-Type-based body validation schemas to enforce data integrity or security constraints. How to fix Interpretation Conflict? Upgrade `fastify` to version 5.7.2 or higher.	<5.7.2
M Allocation of Resources Without Limits or Throttling fastify is an overhead web framework, for Node.js. Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the `sendWebStream` function. An attacker can cause excessive memory consumption by sending a slow or non-reading client request, leading to unbounded buffering and severe performance degradation or process crashes. Note: Only applications that return a `ReadableStream` (or `Response` with a `Web Stream` body) via `reply.send()` are impacted How to fix Allocation of Resources Without Limits or Throttling? Upgrade `fastify` to version 5.7.3 or higher.	<5.7.3

Vulnerability

Vulnerable Version

Interpretation Conflict

fastify is an overhead web framework, for Node.js.

Affected versions of this package are vulnerable to Interpretation Conflict via the Content-Type header processing. An attacker can bypass body validation by appending a tab character (\t) and arbitrary content to the Content-Type header, causing the server to treat the body as the intended type without enforcing validation rules.

Note: This vulnerability affects all Fastify users who rely on Content-Type-based body validation schemas to enforce data integrity or security constraints.

How to fix Interpretation Conflict?

Upgrade fastify to version 5.7.2 or higher.

<5.7.2

Allocation of Resources Without Limits or Throttling

fastify is an overhead web framework, for Node.js.

Affected versions of this package are vulnerable to Allocation of Resources Without Limits or Throttling via the sendWebStream function. An attacker can cause excessive memory consumption by sending a slow or non-reading client request, leading to unbounded buffering and severe performance degradation or process crashes.

Note: Only applications that return a ReadableStream (or Response with a Web Stream body) via reply.send() are impacted

How to fix Allocation of Resources Without Limits or Throttling?

Upgrade fastify to version 5.7.3 or higher.

<5.7.3

fastify@5.7.1 vulnerabilities

Fast and low overhead web framework, for Node.js

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Direct Vulnerabilities

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