CVE-2026-41871

9.8 CRITICAL 0.7% exploit odds Fix listed Auth & access Server

What it is

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/ .

At a glance

Exploitability: Can be exploited over the network without logging in. High risk of data exposure, data tampering, service disruption.
Exploit odds: 0.7% chance of exploitation in the next 30 days (EPSS).
Fix: A patch, advisory or fixed version is referenced. Upgrade or apply it.

Timeline

2026-09-09 11:17 UTC PublishedDisclosed publicly on CVE.org and NVD
2026-09-10 20:38 UTC Last updatedMost recent change to the record

Details

Published: 2026-09-09 11:17 UTC
Last modified: 2026-09-10 20:38 UTC
Exploit probability: 0.7% · EPSS, next 30 days
Weakness: CWE-470
Record status: Analyzed

Affected

Apache Nutch < 1.23

Attack profile CVSS 3.1 · 9.8

Attack vector: Network
Complexity: Low
Privileges needed: None
User interaction: None
Scope: Unchanged
Confidentiality: High
Integrity: High
Availability: High

Raw vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

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Fix and advisories

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

References

NVD record · CVE.org record