CVE-2026-19481 | fastify busboy up to 3.2.0 Header Parser prototype pollution

A vulnerability, which was classified as critical, was found in fastify busboy up to 3.2.0. Affected by this vulnerability is an unknown functionality of the component Header Parser. Executing a manipulation can lead to improperly controlled modification of object prototype attributes.

This vulnerability is handled as CVE-2026-19481. The attack can be executed remotely. There is not any exploit available.

You should upgrade the affected component.