CVE-2026-41871

EUVD-2026-74803

09.09.2026, 11:17

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/ .

Unsafe Reflection

Provider	Type	Base Score	Atk. Vector	Atk. Complexity	Priv. Required	Vector
apache	CNA	UNKNOWN				---

Base Score

CVSS 3.x

EPSS Score

Percentile: Unknown

Early Detection

Affected products identified ahead of NVD analysis through intelligence sources.

Vendor	Product	Version	Source
apache	nutch	1.10 ≤ 𝑥 ≤ 1.22	CNA

Common Weakness Enumeration

CWE-470 - Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
The application uses external input with reflection to select which classes or code to use, but it does not sufficiently prevent the input from selecting improper classes or code.

References

https://lists.apache.org/thread/rbr63fx8vlrhzrfknq2l0mg0d0blsl54

http://www.openwall.com/lists/oss-security/2026/09/08/5