CVE-2026-47898

CRITICALNVD 9.89.8—
EchelonGraph scoreMEDIUM confidence

Score 9.8 from GitHub Security Advisory published 2026-07-03. NVD baseline CVSS 9.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
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: 0%CVSS: 9.8Exploit: None knownExposed: 0

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

Improper Restriction of XML External Entity Reference vulnerability in Apache Lucene.Net (Lucene.Net.Analysis.Common library).

This issue affects Apache Lucene.Net.Analysis.Common: from 4.8.0-beta00005 before 4.8.0-beta00018.

Users are recommended to upgrade to version 4.8.0-beta00018, which fixes the issue.

CVSS v3
9.8
EG Score
9.8(medium)
EG Risk
44(Track)
EG Risk 44/100SSVC: 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%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
39%
KEV
Not listed

Published

July 3, 2026

Last Modified

July 8, 2026

Advisory Details (2)

Auto-updated Aug 23, 2026
No patch confirmed yet.
generic

oss-security - CVE-2026-47898: Apache Lucene.Net: XXE vulnerability in Lucene.Net.Analysis.Common PatternParser

http://www.openwall.com/lists/oss-security/2026/07/03/3
generic
https://lists.apache.org/thread/7yn9k6sbbsk18yco5y2hszpcf8dst489

Vendor Advisories for CVE-2026-47898(1)

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

Weakness Classification(1)

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

Data Freshness Timeline

(refreshed 40× in last 7d / 214× 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.

Showing the most recent 100 of 310 total refreshes for this CVE.

  1. 2026-08-27 03:15 UTCEG score recompute
  2. 2026-08-27 03:15 UTCGHSA enrichment
  3. 2026-08-26 14:46 UTCEPSS rescore
  4. 2026-08-25 13:49 UTCEPSS rescore
  5. 2026-08-25 13:38 UTCGHSA enrichment
  6. 2026-08-25 04:57 UTCGHSA enrichment
  7. 2026-08-25 00:55 UTCGHSA enrichment
  8. 2026-08-24 20:54 UTCEG score recompute
  9. 2026-08-24 20:54 UTCGHSA enrichment
  10. 2026-08-24 14:14 UTCGHSA enrichment
  11. 2026-08-24 10:13 UTCEG score recompute
  12. 2026-08-24 10:13 UTCGHSA enrichment
  13. 2026-08-24 04:07 UTCGHSA enrichment
  14. 2026-08-23 23:27 UTCGHSA enrichment
  15. 2026-08-23 19:25 UTCGHSA enrichment
  16. 2026-08-23 15:23 UTCGHSA enrichment
  17. 2026-08-23 11:21 UTCGHSA enrichment
  18. 2026-08-23 07:19 UTCGHSA enrichment
  19. 2026-08-23 03:17 UTCEG score recompute
  20. 2026-08-23 03:17 UTCGHSA enrichment
  21. 2026-08-23 00:19 UTCEPSS rescore
  22. 2026-08-22 23:11 UTCGHSA enrichment
  23. 2026-08-22 19:09 UTCGHSA enrichment
  24. 2026-08-22 14:03 UTCGHSA enrichment
  25. 2026-08-22 10:00 UTCGHSA enrichment
Show 75 more
  1. 2026-08-22 05:58 UTCGHSA enrichment
  2. 2026-08-22 01:18 UTCEG score recompute
  3. 2026-08-22 01:18 UTCGHSA enrichment
  4. 2026-08-21 23:49 UTCEPSS rescore
  5. 2026-08-21 21:16 UTCGHSA enrichment
  6. 2026-08-21 17:14 UTCGHSA enrichment
  7. 2026-08-21 12:29 UTCGHSA enrichment
  8. 2026-08-21 08:27 UTCGHSA enrichment
  9. 2026-08-21 04:26 UTCGHSA enrichment
  10. 2026-08-21 00:24 UTCEG score recompute
  11. 2026-08-21 00:24 UTCGHSA enrichment
  12. 2026-08-20 22:55 UTCEPSS rescore
  13. 2026-08-20 20:22 UTCGHSA enrichment
  14. 2026-08-20 16:20 UTCGHSA enrichment
  15. 2026-08-20 12:19 UTCGHSA enrichment
  16. 2026-08-20 07:57 UTCGHSA enrichment
  17. 2026-08-20 03:56 UTCEG score recompute
  18. 2026-08-20 03:56 UTCGHSA enrichment
  19. 2026-08-19 17:04 UTCEPSS rescore
  20. 2026-08-19 14:07 UTCGHSA enrichment
  21. 2026-08-19 09:51 UTCGHSA enrichment
  22. 2026-08-19 05:29 UTCGHSA enrichment
  23. 2026-08-19 00:56 UTCGHSA enrichment
  24. 2026-08-18 20:52 UTCEG score recompute
  25. 2026-08-18 20:52 UTCGHSA enrichment
  26. 2026-08-18 13:48 UTCEPSS rescore
  27. 2026-08-18 11:45 UTCGHSA enrichment
  28. 2026-08-18 04:27 UTCGHSA enrichment
  29. 2026-08-17 22:49 UTCGHSA enrichment
  30. 2026-08-17 16:49 UTCEG score recompute
  31. 2026-08-17 16:49 UTCGHSA enrichment
  32. 2026-08-17 13:47 UTCEPSS rescore
  33. 2026-08-17 12:18 UTCGHSA enrichment
  34. 2026-08-17 08:16 UTCGHSA enrichment
  35. 2026-08-17 04:15 UTCGHSA enrichment
  36. 2026-08-17 00:13 UTCGHSA enrichment
  37. 2026-08-16 20:11 UTCGHSA enrichment
  38. 2026-08-16 16:09 UTCEG score recompute
  39. 2026-08-16 16:09 UTCGHSA enrichment
  40. 2026-08-16 14:56 UTCEPSS rescore
  41. 2026-08-16 12:07 UTCGHSA enrichment
  42. 2026-08-16 08:06 UTCGHSA enrichment
  43. 2026-08-16 04:05 UTCEG score recompute
  44. 2026-08-16 04:05 UTCGHSA enrichment
  45. 2026-08-16 02:14 UTCEPSS rescore
  46. 2026-08-16 00:03 UTCGHSA enrichment
  47. 2026-08-15 20:01 UTCGHSA enrichment
  48. 2026-08-15 15:59 UTCGHSA enrichment
  49. 2026-08-15 11:57 UTCGHSA enrichment
  50. 2026-08-15 07:55 UTCGHSA enrichment
  51. 2026-08-15 02:16 UTCEG score recompute
  52. 2026-08-15 02:16 UTCGHSA enrichment
  53. 2026-08-15 01:30 UTCEPSS rescore
  54. 2026-08-14 22:15 UTCGHSA enrichment
  55. 2026-08-14 18:14 UTCGHSA enrichment
  56. 2026-08-14 14:12 UTCGHSA enrichment
  57. 2026-08-14 10:11 UTCGHSA enrichment
  58. 2026-08-14 06:09 UTCGHSA enrichment
  59. 2026-08-14 02:08 UTCGHSA enrichment
  60. 2026-08-13 22:07 UTCEG score recompute
  61. 2026-08-13 22:07 UTCGHSA enrichment
  62. 2026-08-13 22:00 UTCEPSS rescore
  63. 2026-08-13 18:04 UTCGHSA enrichment
  64. 2026-08-13 13:25 UTCGHSA enrichment
  65. 2026-08-13 09:24 UTCGHSA enrichment
  66. 2026-08-13 05:22 UTCGHSA enrichment
  67. 2026-08-13 01:21 UTCGHSA enrichment
  68. 2026-08-12 21:20 UTCGHSA enrichment
  69. 2026-08-12 17:18 UTCEG score recompute
  70. 2026-08-12 17:18 UTCGHSA enrichment
  71. 2026-08-12 13:51 UTCEPSS rescore
  72. 2026-08-12 13:17 UTCGHSA enrichment
  73. 2026-08-12 09:15 UTCGHSA enrichment
  74. 2026-08-12 05:13 UTCGHSA enrichment
  75. 2026-08-12 01:11 UTCGHSA enrichment

Frequently asked(5)

What is CVE-2026-47898?
CVE-2026-47898 is a critical vulnerability published on July 3, 2026. Improper Restriction of XML External Entity Reference vulnerability in Apache Lucene.Net (Lucene.Net.Analysis.Common library). This issue affects Apache Lucene.Net.Analysis.Common: from 4.8.0-beta00005 before 4.8.0-beta00018. Users are recommended to upgrade to version 4.8.0-beta00018, which fixes…
When was CVE-2026-47898 disclosed?
CVE-2026-47898 was first published in the National Vulnerability Database on July 3, 2026, with the most recent update on July 8, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-47898 actively exploited?
CVE-2026-47898 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0% probability of exploitation in the next 30 days, which ranks it in the top 61.4% of all scored CVEs.
What is the CVSS score of CVE-2026-47898?
CVE-2026-47898 has a CVSS v3 base score of 9.8 (NVD).
How do I remediate CVE-2026-47898?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-47898, 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.

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