CVE-2026-39816: Apache NiFi: Missing Execute Code Required Permission on TinkerpopClientService
The optional extension component TinkerpopClientService is missing the Restricted annotation with the Execute Code Required Permission in Apache NiFi 2.0.0-M1 through 2.8.0. The TinkerpopClientService supports configuration of ByteCode Submission for the Script Submission Type, enabling Groovy Script execution in the service prior to submitting the query. The missing Restricted annotation allows users without the Execute Code Permission to configure the Service in installations that use fine-grained authorization and have the optional TinkerpopClientService installed. Apache NiFi installations that do not have the nifi-other-graph-services-nar installed are not subject to this vulnerability. Upgrading to Apache NiFi 2.9.0 is the recommended mitigation.
Affected Software
Event History
Frequently Asked Questions
What is the severity of CVE-2026-39816?
The severity of CVE-2026-39816 is classified as high, with a CVSS score of 7.5.
What is CVE-2026-39816 related to?
CVE-2026-39816 pertains to a missing Execute Code Required Permission for the TinkerpopClientService in Apache NiFi.
How can CVE-2026-39816 be mitigated?
To mitigate CVE-2026-39816, it is advised to apply proper permissions and annotations required for the TinkerpopClientService in Apache NiFi.
Which versions of Apache NiFi are affected by CVE-2026-39816?
CVE-2026-39816 affects Apache NiFi versions from 2.0.0-M1 through 2.8.0.
Is there an official fix for CVE-2026-39816?
Yes, an official fix for CVE-2026-39816 should be obtained through an updated version of Apache NiFi that addresses the missing permission issue.