CVE-2026-25903
Plain English Summary
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This vulnerability allows a less privileged user to change settings on certain components that should only be modified by more privileged users, potentially leading to unauthorized access or manipulation of data flows. It affects specific versions of Apache NiFi and requires that the installation does not have proper authorization controls in place for restricted components; upgrading to the latest version is necessary to fix this issue.
Technical 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.
CVSS Vector Analysis
Vector String
CVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:P/AU:Y/R:I/V:C/RE:M/U:AmberExploit Resources
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Quick Information
Published
Feb 17, 2026
about 2 months ago
Last Modified
Feb 18, 2026
about 2 months ago