CVE-2026-41871

CRITICALPre-NVD 9.89.8—
EchelonGraph scoreHIGH confidence

Score 9.8 from GitHub Security Advisory (severity: CRITICAL) published 2026-09-09. CISA-ADP (Vulnrichment) CVSS v3.1 baseline 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: cisa-adp, epss, ghsa
Trending — 3 sources updated this week
9.8EG
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 1%CVSS: 9.8Exploit: None knownExposed: 0

No vendor fix yet — apply a workaround or compensating control (WAF / firewall / segmentation) and watch for a patch.

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/ .

CVSS v3
9.8
EG Score
9.8(high)
EG Risk
49(Track)
EG Risk 49/100SSVC: Track

EG Risk is EchelonGraph's 0–100 priority score: it fuses intrinsic severity with real-world exploitation and automatability so you can rank equal-severity CVEs and fix the most dangerous first. Higher = act sooner. Distinct from the 0–10 EG Score (severity).

How it’s computed
Severity98% × 45%
Exploitation1% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
1%
EPSS %ILE
54%
KEV
Not listed

Published

September 9, 2026

Last Modified

September 10, 2026

Advisory Details (2)

Auto-updated Sep 17, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-41871: Apache Nutch: Unauthenticated reflection-based job execution in Nutch Server (Nutch REST API)

http://www.openwall.com/lists/oss-security/2026/09/08/5
generic
https://lists.apache.org/thread/rbr63fx8vlrhzrfknq2l0mg0d0blsl54

Vendor Advisories for CVE-2026-41871(1)

These vendors published their own advisory mentioning this CVE — often with vendor-specific remediation steps + affected product lists not in NVD.

Weakness Classification(2)

MITRE Common Weakness Enumeration — the root-cause categories this CVE belongs to.

Data Freshness Timeline

(refreshed 57× in last 7d / 79× in last 30d)

Each row is a source pipeline that fetched or updated this CVE on that date, with what changed. For example, "NVD update" means NVD published or revised its analysis for this CVE; "MITRE cvelistV5" means we ingested or refreshed it from the CNA feed. Most recent first.

  1. 2026-09-19 05:16 UTCGHSA enrichment
  2. 2026-09-19 01:36 UTCGHSA enrichment
  3. 2026-09-18 21:56 UTCEG score recompute
  4. 2026-09-18 21:56 UTCGHSA enrichment
  5. 2026-09-18 19:28 UTCEPSS rescore
  6. 2026-09-18 18:17 UTCGHSA enrichment
  7. 2026-09-18 14:35 UTCGHSA enrichment
  8. 2026-09-18 10:55 UTCGHSA enrichment
  9. 2026-09-18 07:15 UTCGHSA enrichment
  10. 2026-09-18 03:35 UTCGHSA enrichment
  11. 2026-09-17 23:55 UTCGHSA enrichment
  12. 2026-09-17 20:15 UTCEG score recompute
  13. 2026-09-17 20:15 UTCGHSA enrichment
  14. 2026-09-17 19:31 UTCEPSS rescore
  15. 2026-09-17 13:00 UTCGHSA enrichment
  16. 2026-09-17 08:54 UTCGHSA enrichment
  17. 2026-09-17 05:12 UTCGHSA enrichment
  18. 2026-09-17 01:32 UTCGHSA enrichment
  19. 2026-09-16 21:52 UTCGHSA enrichment
  20. 2026-09-16 18:12 UTCEG score recompute
  21. 2026-09-16 18:12 UTCGHSA enrichment
  22. 2026-09-16 14:08 UTCEPSS rescore
  23. 2026-09-16 13:58 UTCGHSA enrichment
  24. 2026-09-16 10:17 UTCGHSA enrichment
  25. 2026-09-16 06:37 UTCEG score recompute
Show 54 more
  1. 2026-09-16 06:37 UTCGHSA enrichment
  2. 2026-09-16 05:15 UTCEPSS rescore
  3. 2026-09-16 02:58 UTCGHSA enrichment
  4. 2026-09-15 23:18 UTCGHSA enrichment
  5. 2026-09-15 19:09 UTCGHSA enrichment
  6. 2026-09-15 15:29 UTCGHSA enrichment
  7. 2026-09-15 11:50 UTCGHSA enrichment
  8. 2026-09-15 08:10 UTCGHSA enrichment
  9. 2026-09-15 04:30 UTCEG score recompute
  10. 2026-09-15 04:30 UTCGHSA enrichment
  11. 2026-09-15 00:50 UTCGHSA enrichment
  12. 2026-09-14 21:10 UTCGHSA enrichment
  13. 2026-09-14 17:20 UTCGHSA enrichment
  14. 2026-09-14 13:40 UTCGHSA enrichment
  15. 2026-09-14 09:57 UTCGHSA enrichment
  16. 2026-09-14 06:17 UTCGHSA enrichment
  17. 2026-09-14 02:37 UTCGHSA enrichment
  18. 2026-09-13 22:57 UTCGHSA enrichment
  19. 2026-09-13 19:17 UTCEG score recompute
  20. 2026-09-13 19:17 UTCGHSA enrichment
  21. 2026-09-13 16:47 UTCEPSS rescore
  22. 2026-09-13 15:37 UTCGHSA enrichment
  23. 2026-09-13 11:54 UTCGHSA enrichment
  24. 2026-09-13 08:14 UTCGHSA enrichment
  25. 2026-09-13 04:35 UTCGHSA enrichment
  26. 2026-09-13 00:55 UTCGHSA enrichment
  27. 2026-09-12 21:15 UTCGHSA enrichment
  28. 2026-09-12 17:35 UTCEG score recompute
  29. 2026-09-12 17:35 UTCGHSA enrichment
  30. 2026-09-12 15:01 UTCEPSS rescore
  31. 2026-09-12 13:55 UTCGHSA enrichment
  32. 2026-09-12 10:15 UTCGHSA enrichment
  33. 2026-09-12 06:33 UTCGHSA enrichment
  34. 2026-09-12 02:52 UTCGHSA enrichment
  35. 2026-09-11 23:12 UTCGHSA enrichment
  36. 2026-09-11 19:00 UTCGHSA enrichment
  37. 2026-09-11 15:18 UTCEG score recompute
  38. 2026-09-11 15:18 UTCGHSA enrichment
  39. 2026-09-11 14:53 UTCEPSS rescore
  40. 2026-09-11 11:38 UTCEG score recompute
  41. 2026-09-11 11:38 UTCGHSA enrichment
  42. 2026-09-11 09:37 UTCEPSS rescore
  43. 2026-09-11 07:43 UTCGHSA enrichment
  44. 2026-09-11 04:04 UTCGHSA enrichment
  45. 2026-09-11 00:23 UTCGHSA enrichment
  46. 2026-09-10 20:43 UTCEG score recompute
  47. 2026-09-10 20:43 UTCGHSA enrichment
  48. 2026-09-10 18:22 UTCEG score recompute▲ 9.80
  49. 2026-09-10 18:22 UTCGHSA enrichment
  50. 2026-09-10 18:21 UTCNVD updateCVSS v3 → 9.8 · severity → CRITICAL
  51. 2026-09-09 15:48 UTCGHSA enrichment
  52. 2026-09-09 11:24 UTCNVD update
  53. 2026-09-09 10:50 UTCEG score recompute
  54. 2026-09-09 10:49 UTCMITRE cvelistV5first tracked

Frequently asked(5)

What is CVE-2026-41871?
CVE-2026-41871 is a critical vulnerability published on September 9, 2026. 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.…
When was CVE-2026-41871 disclosed?
CVE-2026-41871 was first published in the National Vulnerability Database on September 9, 2026, with the most recent update on September 10, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-41871 actively exploited?
CVE-2026-41871 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 1% probability of exploitation in the next 30 days, which ranks it in the top 45.7% of all scored CVEs.
What is the CVSS score of CVE-2026-41871?
CVE-2026-41871 has a CVSS v3.1 base score of 9.8 (CISA-ADP / Vulnrichment enrichment; NVD's own analysis pending).
How do I remediate CVE-2026-41871?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-41871, EchelonGraph cross-links them in the Vendor Advisories panel below — those typically contain the canonical remediation steps, fixed version numbers, and any vendor-specific mitigations.

Dependency Blast Radius

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