CVE-2026-39816
HighSummary
The optional extension component TinkerpopClientService in Apache NiFi versions 2.0.0-M1 through 2.8.0 is missing the Restricted annotation with the Execute Code Required Permission. This allows users without the necessary permissions to configure the service, potentially leading to unauthorized execution of Groovy scripts.
Risk Assessment
The lack of proper permissions for code execution may lead to unauthorized access and potential attacks on the system. Organizations should be aware of the risks associated with misconfigured services in environments with fine-grained authorization.
Recommendation
It is recommended to upgrade to Apache NiFi version 2.9.0 to mitigate this vulnerability. Organizations should also consider reviewing permission configurations for TinkerpopClientService components.
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Original NVD description (English source)
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.