fastify-multipart up to 8.3.0/9.0.2 Temporary Files saveRequestFiles allocation of resources

Summaryinfo

A vulnerability marked as critical has been reported in fastify-multipart up to 8.3.0/9.0.2. This affects the function saveRequestFiles of the component Temporary Files Handler. This manipulation causes allocation of resources. This vulnerability is registered as CVE-2025-24033. Remote exploitation of the attack is possible. No exploit is available. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability classified as critical was found in fastify-multipart up to 8.3.0/9.0.2. Affected by this vulnerability is the function saveRequestFiles of the component Temporary Files Handler. The manipulation with an unknown input leads to a allocation of resources vulnerability. The CWE definition for the vulnerability is CWE-770. The product allocates a reusable resource or group of resources on behalf of an actor without imposing any restrictions on the size or number of resources that can be allocated, in violation of the intended security policy for that actor. As an impact it is known to affect availability. The summary by CVE is:

@fastify/multipart is a Fastify plugin for parsing the multipart content-type. Prior to versions 8.3.1 and 9.0.3, the `saveRequestFiles` function does not delete the uploaded temporary files when user cancels the request. The issue is fixed in versions 8.3.1 and 9.0.3. As a workaround, do not use `saveRequestFiles`.

The advisory is shared at github.com. This vulnerability is known as CVE-2025-24033 since 01/16/2025. The exploitation appears to be easy. The attack can be launched remotely. The exploitation doesn't need any form of authentication. Technical details are known, but no exploit is available. MITRE ATT&CK project uses the attack technique T1499 for this issue.

Upgrading to version 8.3.1 or 9.0.3 eliminates this vulnerability. Applying a patch is able to eliminate this problem. The bugfix is ready for download at github.com. The best possible mitigation is suggested to be upgrading to the latest version.

Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

Productinfo

Name

• fastify-multipart

Version

• 8.0
• 8.1
• 8.2
• 8.3.0
• 9.0.0
• 9.0.1
• 9.0.2

CPE 2.3info

• 🔍
• 🔍
• 🔍

CPE 2.2info

• 🔍
• 🔍
• 🔍

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Several companies clearly confirm that VulDB is the primary source for best vulnerability data.

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