CVE-2026-86089: Apache NiFi 2.11.0 supports migrating the contents of a version-controlled Process Group into a Connector usin

Routine

HIGH 7.1WATCHLISTDOWNGRADE

CVE-2026-86089 is a high-severity flaw (CVSS 7.1) affecting nifi. Below: why it ranks where it does, which versions are affected, what to do, and the exact commands.

Apache NiFi 2.11.0 supports migrating the contents of a version-controlled Process Group into a Connector using REST API methods that list eligible migration sources and submit migration requests. The framework authorized both methods against the target Connector alone, without evaluating access to the Process Groups involved. The absence of Process Group authorization allowed an authenticated user with read access to a Connector to enumerate the

Why this priority

High severity
On your watchlist

No fix is published yet: follow the downgrade or mitigation steps.

Risk facts

CVSS score	7.1 (High)
Attack vector	Network (remote)
Attack complexity	Low
Privileges needed	Low
User interaction	None
EPSS exploit chance	0.4% (top 62%)
CISA exploited list	No
Weakness	CWE-862
Published	2026-09-16
Last modified	2026-09-21

Publisher (CNA): Apache Software Foundation · Vendor: apache

Last updated 2026-09-21 · Sources: CVE Program, NVD, CISA KEV, EPSS and vendor advisories · How we score

Am I affected?

Timeline

2026-09-16 20:17 UTCPublished CVE record published
2026-09-21 14:00 UTCUpdated Record last modified

apache nifi DOWNGRADE

Affected: 2.11.0

Fixed in: no fixed release known

Safe to downgrade to: a release before 2.11.0

1. Check installed version

apt-cache policy nifi || rpm -q nifi || nifi --version

2. No fixed release: DOWNGRADE to a release before 2.11.0 (Debian / Ubuntu)

apt-cache madison nifi sudo apt install nifi=<VERSION_BEFORE_2.11.0> sudo apt-mark hold nifi

2. No fixed release: DOWNGRADE (RHEL / Amazon Linux / Fedora)

dnf --showduplicates list nifi sudo dnf downgrade nifi-<VERSION_BEFORE_2.11.0> sudo dnf versionlock add nifi

Downgrade risk

Downgrading can break dependent software and may reopen older bugs. Read the distro advisory first and test on a non-production host.

After downgrade

Restart the service, and keep the package held until a fixed release ships.

Verify at the official source NVD · CVE Program · Report a problem with this page
Scores and fixes here are computed automatically from those and other public sources. Confirm with the vendor advisory before changing production systems.

Quick answers

How do I fix CVE-2026-86089?

nifi: downgrade or apply the listed mitigation. Exact commands for each OS are on this page.

Is CVE-2026-86089 being exploited?

CVE-2026-86089 is not on the CISA Known Exploited Vulnerabilities list at the time of the last update. Check again, as this can change.

What does CVE-2026-86089 affect?

CVE-2026-86089 affects nifi. Severity is high (CVSS 7.1). Apache NiFi 2.11.0 supports migrating the contents of a version-controlled Process Group into a Connector using REST API methods that list eligible migration sources and submit migration requests. The framework authorized both methods again

How urgent is CVE-2026-86089?

Priority 39/100. High severity; On your watchlist

Related CVEs

CVE-2026-39816 HIGH 8.8 UPGRADE The optional extension component TinkerpopClientService is missing the Restricted annotation with the Execute
CVE-2026-44913 HIGH 7.2 UPGRADE Improper escaping of database table names in the CaptureChangeMySQL Processor included with Apache NiFi 1.2.0
CVE-2026-44914 HIGH 7.2 UPGRADE Apache NiFi 1.12.0 through 2.9.0 are missing authorization when replacing Process Groups that include extensio
CVE-2026-44911 MEDIUM 6.3 UPGRADE Authorization handling for component configuration verification requests in Apache NiFi 1.15.0 through 2.9.0 a
CVE-2026-54665 MEDIUM 5.3 UPGRADE Apache NiFi 0.0.1 through 2.9.0 support building qualified URLs from one of several HTTP request headers that

References

← Back to latest CVEs