How severe is CVE-2026-25903?

CVE-2026-25903 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.

Is CVE-2026-25903 being actively exploited?

It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.

What products are affected by CVE-2026-25903?

CVE-2026-25903 affects Apache Nifi. See the affected-products list for the exact vulnerable versions.

How do I fix CVE-2026-25903?

Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.

Does CVE-2026-25903 have an EU (EUVD) identifier?

Yes. CVE-2026-25903 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7819.

When was CVE-2026-25903 published?

CVE-2026-25903 was published on 2026-02-17 and last updated on 2026-06-17.

CVE-2026-25903

CVE-2026-25903 is a medium-severity vulnerability in Apache Nifi with a CVSS 3.x base score of 6.6. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-862.

Key facts

Severity: Medium (CVSS 3.x base score 6.6)
CVSS v4: 8.7
EPSS exploit prediction: 1% (52nd percentile)
Actively exploited: Not listed in CISA KEV
EU (EUVD) id: EUVD-2026-7819
Weakness: CWE-862
Affected product: Apache Nifi
Published: 2026-02-17
Last modified: 2026-06-17

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.

Frequently asked questions

What is CVE-2026-25903?: 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.
How severe is CVE-2026-25903?: CVE-2026-25903 has a CVSS 3.x base score of 6.6, rated medium severity. It is exploitable over network with high attack complexity, requires high privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
Is CVE-2026-25903 being actively exploited?: It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 1% (52nd percentile), an estimate of the probability of exploitation in the next 30 days.
What products are affected by CVE-2026-25903?: CVE-2026-25903 affects Apache Nifi. See the affected-products list for the exact vulnerable versions.
How do I fix CVE-2026-25903?: Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround.
Does CVE-2026-25903 have an EU (EUVD) identifier?: Yes. CVE-2026-25903 is tracked in the ENISA EU Vulnerability Database (EUVD) as EUVD-2026-7819.
When was CVE-2026-25903 published?: CVE-2026-25903 was published on 2026-02-17 and last updated on 2026-06-17.

References

Affected products (1)

cpe:2.3:a:apache:nifi:*:*:*:*:*:*:*:*

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