Apache NiFi up to 2.9.0 missing authentication

Summaryinfo

A vulnerability classified as critical has been found in Apache NiFi up to 2.9.0. Affected by this vulnerability is an unknown functionality. The manipulation leads to missing authentication. This vulnerability is documented as CVE-2026-44914. The attack can be initiated remotely. There is not any exploit available. It is recommended to upgrade the affected component.

Detailsinfo

A vulnerability was found in Apache NiFi up to 2.9.0. It has been rated as critical. This issue affects some unknown processing. The manipulation with an unknown input leads to a missing authentication vulnerability. Using CWE to declare the problem leads to CWE-306. The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources. Impacted is confidentiality, integrity, and availability. The summary by CVE is:

Apache NiFi 1.12.0 through 2.9.0 are missing authorization when replacing Process Groups that include extension components with specific Required Permissions based on the Restricted annotation. The Restricted annotation indicates additional privileges required, but framework authorization did not check restricted status when handling requests to replace Process Groups. The missing authorization permits a user with general write access to add components with Restricted status. Apache NiFi installations that do not implement specific authorization for Restricted components are not subject to this vulnerability because the framework enforces write permissions as the security boundary. Upgrading to Apache NiFi 2.9.0 is the recommended mitigation, which removes the implementation of Restricted status authorization from the framework.

The advisory is shared at lists.apache.org. The identification of this vulnerability is CVE-2026-44914. The exploitation is known to be easy. The attack may be initiated remotely. No form of authentication is needed for a successful exploitation. Neither technical details nor an exploit are publicly available. The price for an exploit might be around USD $0-$5k at the moment (estimation calculated on 06/27/2026).

Upgrading to version 2.10.0 eliminates this vulnerability. The upgrade is hosted for download at issues.apache.org.

The vulnerability is also documented in the vulnerability database at EUVD (EUVD-2026-38219). If you want to get the best quality for vulnerability data then you always have to consider VulDB.

Productinfo

Vendor

• Apache

Name

• NiFi

Version

• 2.0
• 2.1
• 2.2
• 2.3
• 2.4
• 2.5
• 2.6
• 2.7
• 2.8
• 2.9.0

License

• open-source

Website

• Vendor: https://www.apache.org/

CPE 2.3info

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CPE 2.2info

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Entryinfo

If you want to get the best quality for vulnerability data then you always have to consider VulDB.

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