---
title: "CVE-2026-86089: Apache NiFi - Broken Access Control"
description: "Apache NiFi 2.11.0 contains a broken access control vulnerability caused by missing authorization checks on Process Groups during migration via REST API, letting authenticated users with Connector access enumerate or migrate Process Groups without proper permissions, exploit requires authenticated user with Connector read or write access."
url: https://panop.io/threat-heartbeat/CVE-2026-86089/
---

# CVE-2026-86089 Apache NiFi - Broken Access Control

Apache NiFi 2.11.0 contains a broken access control vulnerability caused by missing authorization checks on Process Groups during migration via REST API, letting authenticated users with Connector access enumerate or migrate Process Groups without proper permissions, exploit requires authenticated user with Connector read or write access.

CVSS base score 7.1 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

EPSS

0.44% chance of exploitation in 30 days

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-86089)

## Details

Type

Broken Access Control

Impact

Information Disclosure, Data Tampering

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:H/A:N

Published

16 September 2026

Updated

15 October 2026

Weakness

[CWE-862](https://cwe.mitre.org/data/definitions/862.html)

## Vendor fix

Upgrade to Apache NiFi 2.12.0 or later.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-86089](https://nvd.nist.gov/vuln/detail/CVE-2026-86089)
- [https://lists.apache.org/thread/lnpqnn61k62fkgxqd9cftf7sr77jhrk1](https://lists.apache.org/thread/lnpqnn61k62fkgxqd9cftf7sr77jhrk1)
- [http://www.openwall.com/lists/oss-security/2026/09/16/10](http://www.openwall.com/lists/oss-security/2026/09/16/10)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

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