CVE-2026-3419 | fastify up to 5.8.0 Header Content-Type incorrect regex (GHSA-573f-x89g-hqp9)
A vulnerability, which was classified as problematic, was found in fastify up to 5.8.0. Affected by this issue is some unknown functionality of the component Header Handler. Such manipulation of the argument Content-Type leads to incorrect regular expression.
This vulnerability is documented as CVE-2026-3419. The attack can be executed remotely. There is not any exploit available.
You should upgrade the affected component.