Vulnerability record · CVE-2026-39816 · published 8 May 2026

CVE-2026-39816: Apache nifi missing authorization vulnerability

Apache · Nifi

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.

7.5 CVSS 4.0 High EPSS 0.89% · top 42.3% CWE-862 · Missing authorization

7.5CVSS 4.0 base score

0.89%EPSS exploitation probability, 30 days

NoNot in CISA KEV

1Affected product versions listed by NVD

3References

17 Jun 2026Last modified by NVD

Description

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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:Y/R:

Affected products

1 vulnerable configurations from NVD's CPE data, grouped by vendor and product.

Nifi Apache

References

Link	Tags
https://lists.apache.org/thread/gh9g7xwvv4l20gzff6q3367snf35ctcb	Mailing ListVendor Advisory
http://www.openwall.com/lists/oss-security/2026/04/13/8	Mailing ListThird Party Advisory
https://zeropath.com/blog/nifi-cve-2026-39816-privesc-rce

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Related vulnerabilities

Same products first, then exploited flaws of the same weakness class.

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Source: NIST National Vulnerability Database (record CVE-2026-39816), CISA KEV, FIRST EPSS (scores of 2026-09-26). This page is refreshed as NVD updates the record.