CVE-2026-41871

Apache Nutch: Unauthenticated reflection-based job execution in Nutch Server (Nutch REST API)

Published Sep 9, 2026 CVSS 3.1 · 9.8 Critical EPSS < 1% KEV · Not listed
Description
Missing Authorization, Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Nutch Server (Nutch REST API).



This issue affects Apache Nutch: from 1.10 through 1.22.



Users are recommended to upgrade to version 1.23, which removes the Nutch Server.
If an upgrade is not possible, user must restrict access to instances running the Nutch Service to trusted users only.
Please, also visit the Apache Nutch security advisories https://nutch.apache.org/documentation/security/ .

Remediation

No solution or workaround provided in the CVE record

Tracking

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Advisories

No advisories available
History
Type Values Removed Values Added
First Time appeared Apache
Apache nutch
CPEs cpe:2.3:a:apache:nutch:*:*:*:*:*:*:*:*
Vendors & Products Apache
Apache nutch
Type Values Removed Values Added
Metrics cvssV3_1

{'score': 9.8, 'vector': 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H'}

ssvc

{'options': {'Automatable': 'yes', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}

Type Values Removed Values Added
Description Missing Authorization, Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') vulnerability in Apache Nutch Server (Nutch REST API). This issue affects Apache Nutch: from 1.10 through 1.22. Users are recommended to upgrade to version 1.23, which removes the Nutch Server. If an upgrade is not possible, user must restrict access to instances running the Nutch Service to trusted users only. Please, also visit the Apache Nutch security advisories https://nutch.apache.org/documentation/security/ .
Title Apache Nutch: Unauthenticated reflection-based job execution in Nutch Server (Nutch REST API)
Weaknesses CWE-470
CWE-862
References
Weaknesses

Sources

Status
PUBLISHED
Assigner
apache
Published
Updated
Sep 10, 2026, 5:56 PM
Reserved
Apr 22, 2026, 6:35 AM
Status
Analyzed
Published
Sep 9, 2026, 11:17 AM
Modified
Sep 10, 2026, 8:38 PM