Apache NiFi 2.0.0-M1 to 2.8.0 Unrestricted TinkerpopClientService
CVE-2026-39816 Published on May 8, 2026
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.
Timeline
reported
patched 3 days later.
Weakness Type
What is an AuthZ Vulnerability?
The software does not perform an authorization check when an actor attempts to access a resource or perform an action.
CVE-2026-39816 has been classified to as an AuthZ vulnerability or weakness.
Products Associated with CVE-2026-39816
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Affected Versions
Apache Software Foundation Apache NiFi:- Version 2.0.0-M1, <= 2.8.0 is affected.