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Vulnerabilities CVE-2026-39816

CVE-2026-39816

High
Open
TLP:CLEAR

Apache NiFi: Missing Execute Code Required Permission on TinkerpopClientService

NVD CVE.org
Critical Infrastructure

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Description

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.

Details

CVSS Score
7.5
EPSS Score
0.76%

52.1th percentile

CVSS Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:N/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L/AU:Y/R:I/V:C/RE:L/U:Green
Confidence
90%
Published
May 8, 2026
Last Modified
May 9, 2026
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