CVE-2026-41871: CWE-862 Missing Authorization in Apache Software Foundation Apache Nutch
Affects Apache Software Foundation Apache NutchSource CVE Database V5
Not known to be exploited · CVSS 9.8 Critical.
Data as of 10/25/2026, 04:40:12 UTC
- Exploitation
Not in CISA KEV, no exploitation reported
- EPSS
- 0.7% chance of exploitation in 30 days – higher than 54% of CVEsExploit Prediction Scoring System: the likelihood attackers will use this flaw soon.
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:HWhat to do
Affected software
| Product | Affected | Fixed in |
|---|---|---|
| Apache Software FoundationApache Nutch | Affected
| Fixed in– |
Mavenorg.apache.nutch/nutchpkg:maven/org.apache.nutch/nutchOther threats | Affected
| Fixed in– |
Check your own hosts for these packages with threat-finder (opens in a new tab), our free open-source scanner.
AI-suggested
Upgrade Apache Nutch to version 1.23, which removes the vulnerable Nutch Server component and thus mitigates the vulnerability. If upgrading is not possible, restrict access to the Nutch Service instances to trusted users only. Refer to the official Apache Nutch security advisories for further guidance.
Description
CVE-2026-41871 is a critical vulnerability in Apache Nutch Server's REST API affecting versions 1.10 through 1.22. It involves missing authorization and unsafe reflection, allowing unauthorized access and potentially full compromise. The vulnerability is fixed by upgrading to version 1.23, which removes the vulnerable Nutch Server component. If upgrading is not feasible, restricting access to trusted users is recommended.
Impact
The vulnerability has a CVSS 3.1 score of 9.8 (critical), indicating it allows remote attackers with no privileges and no user interaction to fully compromise confidentiality, integrity, and availability of affected systems running Apache Nutch Server versions 1.10 through 1.22. Exploitation could lead to unauthorized access and arbitrary code execution via unsafe reflection.
Weaknesses
- CWE-862Missing Authorization (opens in a new tab)
Class weaknessLikelihood of exploit: HighCWE Top 25 (2025): #4OWASP Top 10 A01:2025: Broken Access Control (opens in a new tab)
The product does not perform an authorization check when an actor attempts to access a resource or perform an action.
- CWE-470Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection') (opens in a new tab)
Base weaknessOWASP Top 10 A05:2025: Injection (opens in a new tab)
The product 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.