CVE-2017-12632: Apache Nifi

High severity, CVSS 7.5. EPSS: 2.8% chance of exploitation in the next 30 days.

A malicious host header in an incoming HTTP request could cause NiFi to load resources from an external server. The fix to sanitize host headers and compare to a controlled whitelist was applied on the Apache NiFi 1.5.0 release. Users running a prior 1.x release should upgrade to the appropriate release.

Affected products

• Apache Nifi: up to and including 1.4.0

Published 2018-01-23. Last modified 2026-06-17.