CVE-2026-25903Network attack vector

Unauthorized restricted component updates via skipped permission checks

Published Feb 17, 2026 · Updated Feb 17, 2026

Missing authorization in Apache NiFi 1.1.0 through 2.7.2 allows remote authenticated users to alter restricted component properties. Framework update paths enforce general component write access but fail to evaluate the Restricted annotation and its Required Permissions for an existing extension component. A more privileged user must first add the component, and only deployments with distinct Restricted-component authorization levels are exposed; a lower-privileged user can then change policy-protected properties.

CVSS severity8.7
High
EPSS probability0.76%
Next 30 days · Sep 16, 2026
Known exploitationUnconfirmed
Based on sourced intelligence
Hinoki checkNot available
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Summary

What happened

Missing authorization in Apache NiFi 1.1.0 through 2.7.2 allows remote authenticated users to alter restricted component properties. Framework update paths enforce general component write access but fail to evaluate the Restricted annotation and its Required Permissions for an existing extension component. A more privileged user must first add the component, and only deployments with distinct Restricted-component authorization levels are exposed; a lower-privileged user can then change policy-protected properties.

The record

CVE
CVE-2026-25903
Published
Feb 17, 2026
Updated
Feb 17, 2026
Vendor
The Apache Software Foundation
Product
Apache NiFi
Classifications
CWE-862, T1068
Attack vector
network
Privileges
authenticated

Timeline

How it unfolded

  1. Feb 17, 2026CVE publishedPublication date reported by the CVE source.
  2. Feb 17, 2026Record updatedLatest update available in the CVE record.

Exploitability

Present is not the same as exploitable

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Is a vulnerable build present?

Compare these published version ranges with your installed build and any vendor patches.

  1. Affected versionversion=1.1.0 <2.8.0

What conditions does exploitation require?

Attack vectornetwork
Required privilegesauthenticated

What is affected?

The Apache Software Foundation · Apache NiFiversion=1.1.0 <2.8.0

Published CVSS scores

6.6NIST NVDCVSS:3.1/AV:N/AC:H/PR:H/UI:N/S:U/C:H/I:H/A:H
8.7Apache Software FoundationCVSS:4.0/AV:N/AC:L/AT:P/PR:H/UI:A/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H

CVSS describes severity. EPSS estimates exploitation probability.

Attacks

What attackers are doing with it

Daily unique IPs observed by Shadowserver honeypots for known exploited vulnerabilities (KEVs). Missing observations do not establish an absence of attacks.

Daily unique IPsNo honeypot observations are available for this CVE in the selected window.

No observations available

Sep 10, 2026Sep 16, 2026
Latest reporting daySep 16, 2026
Latest daily unique IPsUnavailable
Prior 30-day averageUnavailable
SourceShadowserver honeypots (KEV)
Vectornetwork
Privilegesauthenticated
Known exploitationUnconfirmed
Public exploitUnconfirmed

Weakness, pattern, technique

CWE-862Missing Authorization
T1068Exploitation for Privilege Escalation

Public exploit references

No public exploit references are available in this record.

Labels summarize the accepted research assessment. They do not indicate a test against your environment.

Technologies

Your stack

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Your stack

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