CVE-2026-39816— Apache NiFi: Missing Execute Code Required Permission on TinkerpopClientService
Quick assessment
Affected
Apache Software Foundation Apache NiFi
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Apache NiFi是美国阿帕奇（Apache）基金会的一套数据处理和分发系统。该系统主要用于数据路由、转换和系统中介逻辑。 Apache NiFi 2.0.0-M1版本至2.8.0版本存在安全漏洞，该漏洞源于可选扩展组件TinkerpopClientService缺少Restricted注解，可能导致未授权用户配置服务并执行Groovy脚本。
Possible ATT&CK Techniques 1 AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 1
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Apache Software Foundation | Apache NiFi | 2.0.0-M1≤ 2.8.0 |
affected |
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I. Basic Information for CVE-2026-39816
Vulnerability Information
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Vulnerability Title
Apache NiFi: Missing Execute Code Required Permission on TinkerpopClientService
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
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
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Apache NiFi 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Apache NiFi是美国阿帕奇（Apache）基金会的一套数据处理和分发系统。该系统主要用于数据路由、转换和系统中介逻辑。 Apache NiFi 2.0.0-M1版本至2.8.0版本存在安全漏洞，该漏洞源于可选扩展组件TinkerpopClientService缺少Restricted注解，可能导致未授权用户配置服务并执行Groovy脚本。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| Apache Software Foundation | Apache NiFi | 2.0.0-M1 ~ 2.8.0 | - |
|
II. Public POCs for CVE-2026-39816
| # | POC Description | Source Link | Shenlong Link |
|---|
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Mailing List Discussions for CVE-2026-39816 (1)
Same Patch Batch · Apache Software Foundation · 2026-05-08 · 8 CVEs total
| CVE-2025-66467 | 8.0 HIGH | Apache CloudStack: MinIO policy remains intact on bucket deletion |
| CVE-2025-69233 | 6.5 MEDIUM | Apache CloudStack: Domain/account resources limits not honored |
| CVE-2025-66170 | Apache CloudStack: Any user can list backups that they should not have access to | |
| CVE-2025-66171 | Apache CloudStack: Any user can create a new VM from backups they should not have access t | |
| CVE-2025-66172 | Apache CloudStack: Any user can attach a volume in their VMs from backups they should not | |
| CVE-2026-25077 | Apache CloudStack: Unauthenticated Command Injection in Direct Download Templates | |
| CVE-2026-25199 | Apache CloudStack: Proxmox Extension Allows Unauthorized Cross-Tenant Instance Access |
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V. Comments for CVE-2026-39816
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