CVE-2026-25903 Apache NiFi: Missing Authorization of Restricted Permissions for Component Updates
Less privileged users can modify configuration properties of restricted components in Apache NiFi, bypassing intended authorization checks.
- Exploited in the wild
- Not known
- Login needed
- An administrator
- Attackable
- Over the internet
- Victim action needed
- A user has to click or open something
- Fix
- Available
What is CVE-2026-25903?
CVE-2026-25903 is a high-severity missing authorization vulnerability in Apache Nifi, published on 17 Feb 2026. An attacker needs administrator access to exploit it, and only if a user opens a file or follows a link.
Official description
Apache NiFi 1.1.0 through 2.7.2 are missing authorization when updating configuration properties on extension components that have specific Required Permissions based on the Restricted annotation. The Restricted annotation indicates additional privileges required to add the annotated component to the flow configuration, but framework authorization did not check restricted status when updating a component previously added. The missing authorization requires a more privileged user to add a restricted component to the flow configuration, but permits a less privileged user to make property configuration changes. Apache NiFi installations that do not implement different levels of authorization for Restricted components are not subject to this vulnerability because the framework enforces write permissions as the security boundary. Upgrading to Apache NiFi 2.8.0 is the recommended mitigation.
Weakness: CWE-862
Which versions are affected by CVE-2026-25903?
3 open source packages ship an affected version, including org.apache.nifi:nifi-web-api and nifi. It affects 1 product.
| Package | Affected | Fixed in |
|---|---|---|
org.apache.nifi:nifi-web-api Maven | From 1.1.0 | 2.8.0 |
org.apache.nifi:nifi-web-api Maven | From 1.1.0 | 2.8.0 |
nifi Bitnami | From 1.1.0 | 2.8.0 |
Products include Apache Nifi.
How do I fix CVE-2026-25903?
Upgrade org.apache.nifi:nifi-web-api to 2.8.0 or later.
Upgrade, and check permissions on every request on the server, not only in the interface. More about Missing authorization.
Is CVE-2026-25903 being exploited?
There is no known exploitation of CVE-2026-25903 in the wild and no public exploit code.
Other vulnerabilities in Apache Nifi
- CVE-2018-1309 Improper Restriction of XML External Entity Reference in Apache NiFi
- CVE-2017-15697 Apache NiFi XSS issue in context path handling
- CVE-2017-5636 Injection in Apache NiFi
- CVE-2026-68981 Apache NiFi: Uncontrolled Resource Consumption through Decompression of HTTP Requests
- CVE-2023-36542 Apache NiFi: Potential Code Injection with Properties Referencing Remote Resources
Sources
Also known as BIT-nifi-2026-25903, CLEANSTART-2026-KL73981, CLEANSTART-2026-PF18370, CLEANSTART-2026-VV78172, GHSA-c5w7-m8wf-xc77.