CVE-2026-39816

Published: Mag 08, 2026 Last Modified: Mag 09, 2026
ExploitDB:
Other exploit source:
Google Dorks:
HIGH 7,5
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: high
User Interaction: none
Confidentiality: N/A
Integrity: N/A
Availability: N/A
HIGH 8,8
Source: [email protected]
Attack Vector: network
Attack Complexity: low
Privileges Required: low
User Interaction: none
Scope: unchanged
Confidentiality: high
Integrity: high
Availability: high

Description

AI Translation Available

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.

862

Missing Authorization

Incomplete
Abstraction: Class Structure: Simple
Common Consequences
Security Scopes Affected:
Confidentiality Integrity Access Control Availability
Potential Impacts:
Read Application Data Read Files Or Directories Modify Application Data Modify Files Or Directories Gain Privileges Or Assume Identity Bypass Protection Mechanism Dos: Crash, Exit, Or Restart Dos: Resource Consumption (Cpu) Dos: Resource Consumption (Memory) Dos: Resource Consumption (Other)
Applicable Platforms
Technologies: AI/ML, Database Server, Not Technology-Specific, Web Server
Likelihood of Exploit: High
View CWE Details
Application

Nifi by Apache

Product Information
Vendor Apache
Product Nifi
Version Range Affected
From 2.0.0 (inclusive)
To 2.9.0 (exclusive)
cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*
Common Platform Enumeration - Standardized vulnerability identification
https://zeropath.com/blog/nifi-cve-2026-39816-privesc-rce
https://zeropath.com/blog/nifi-cve-2026-39816-privesc-rce
http://www.openwall.com/lists/oss-security/2026/04/13/8
http://www.openwall.com/lists/oss-security/2026/04/13/8
https://lists.apache.org/thread/gh9g7xwvv4l20gzff6q3367snf3…
https://lists.apache.org/thread/gh9g7xwvv4l20gzff6q3367snf35ctcb