CVE-2026-25903: Apache NiFi: Missing Authorization of Restricted Permissions for Component Updates

[David Handermann <exceptionfactory () apache org>]

Severity: 

Affected versions:

- Apache NiFi (org.apache.nifi:nifi-web-api) 1.1.0 before 2.8.0

Description:

Apache NiFi 1.1.0 through 2.7.2 are missing authorization when updating configuration properties on extension 
components that have specific Required Permissions based on the Restricted annotation. The Restricted annotation 
indicates additional privileges required to add the annotated component to the flow configuration, but framework 
authorization did not check restricted status when updating a component previously added. The missing authorization 
requires a more privileged user to add a restricted component to the flow configuration, but permits a less privileged 
user to make property configuration changes. Apache NiFi installations that do not implement different levels of 
authorization for Restricted components are not subject to this vulnerability because the framework enforces write 
permissions as the security boundary. Upgrading to Apache NiFi 2.8.0 is the recommended mitigation.

This issue is being tracked as NIFI-15567 

Credit:

David Handermann (finder)

References:

https://nifi.apache.org/
https://www.cve.org/CVERecord?id=CVE-2026-25903
https://issues.apache.org/jira/browse/NIFI-15567

Timeline:

2026-02-06: reported