CVE-2026-47898

CRITICALNVD 9.89.8
EchelonGraph scoreMEDIUM confidence

“—” beside the score: it is equal to NVD's CVSS score.

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, GitHub Security Advisory, NVD CVSS v3
9.8EG
EchelonGraph verdictPlan a fixRemediate within your standard update timelines (the SSVC decision on this page).
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.5%CVSS: 9.8Exploit: None knownExposed services: Not assessed

The CVE record names the fixed release — apply it.

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
9.8CRITICALmedium confidence
EG Risk
44
EG Risk 44/100

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 (value × EchelonGraph’s weight)
Severity98% × 45%
The EG Score, 9.8 of 10.
Exploitation0.5% × 40%
FIRST EPSS: the 30-day exploitation probability when EchelonGraph scored this CVE.
Automatability0% × 15%
CISA's SSVC Automatable value: no (Vulnrichment).
SSVC (CISA's decision table, applied by EchelonGraph): Track at every mission impact level.
Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE.
Action: The CVE record names the fixed release. Apply it within your standard update timelines.
EPSS PROB
0.5%
EPSS %ILE
38th
KEV
Not listed

SSVC (CISA's decision table, applied by EchelonGraph)Track at every mission impact level.

The CVE record names the fixed release. Apply it within your standard update timelines.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). All three are CISA's SSVC values (Vulnrichment). EchelonGraph applied CISA's decision table to them; CISA publishes SSVC inputs and the table, not a decision for each CVE. Mission impact is CISA's Mission & Well-being decision point, and only you can judge it. CISA's table makes it high when Mission Prevalence is Essential — the vulnerable component "directly provides capabilities that constitute at least one MEF for at least one entity" (MEF: mission essential function) — or when Public Well-Being Impact is Irreversible: "multiple fatalities are likely", the cyber-physical system "is likely lost or destroyed", "extreme or serious externalities" are imposed on other parties, or social systems such as elections or the financial grid "are destabilized and potentially collapse". CISA's decision table

BOD 26-04 (CISA's remediation timeline, Table 1)60 days if the affected system is publicly exposed; Fix on system upgrade if it is not.

In CISA KEV no (CISA's KEV catalog) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Whether your system is publicly exposed is yours to answer. BOD 26-04 binds US Federal Civilian Executive Branch agencies; for anyone else it is CISA's published timeline, a reference rather than an obligation. The directive · how EchelonGraph applies it

Published

July 3, 2026

Last Modified

July 8, 2026

Advisory Details (2)

Auto-updated Oct 11, 2026
Fix named in the CVE record.
Web page

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

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 10× in last 7d / 40× in last 30d)

Each row is a time one of our pipelines fetched, updated or re-scored this CVE. 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. An arrow marks a change the record states ("CVSS v3 → 9.1"); EPSS and GHSA rows show the values recorded at that time, not what changed (EPSS values are rounded; hover one for the exact figures). Most recent first.

Showing the most recent 100 of 376 refreshes on record for this CVE.

A repeat, a row identical to one the same pipeline wrote less than 10 seconds earlier, is not a separate refresh and is not counted. None are among the latest 100 rows. The 276 oldest rows on record are not shown and were not checked, so the counts can still include repeats.

  1. 2026-10-11 19:44 UTCEG score recompute
  2. 2026-10-11 16:58 UTCEG score recompute
  3. 2026-10-11 14:23 UTCEG score recompute
  4. 2026-10-11 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  5. 2026-10-10 20:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  6. 2026-10-09 20:07 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  7. 2026-10-08 17:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  8. 2026-10-07 23:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  9. 2026-10-06 15:18 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  10. 2026-10-05 17:43 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  11. 2026-10-04 23:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  12. 2026-10-03 14:25 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  13. 2026-10-01 19:50 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  14. 2026-09-30 15:03 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  15. 2026-09-28 13:51 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  16. 2026-09-27 13:48 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  17. 2026-09-26 15:59 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  18. 2026-09-26 00:27 UTCEPSS rescoreEPSS 0.5% · 37th percentile
  19. 2026-09-23 17:53 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  20. 2026-09-23 11:03 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  21. 2026-09-23 06:35 UTCEG score recompute
  22. 2026-09-23 06:35 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  23. 2026-09-20 20:16 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  24. 2026-09-18 19:28 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  25. 2026-09-18 10:14 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
Show 75 more
  1. 2026-09-18 06:12 UTCEG score recompute
  2. 2026-09-18 06:12 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  3. 2026-09-16 14:08 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  4. 2026-09-16 05:15 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  5. 2026-09-14 08:14 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  6. 2026-09-14 04:06 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  7. 2026-09-14 00:04 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  8. 2026-09-13 17:43 UTCEG score recompute
  9. 2026-09-13 17:43 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  10. 2026-09-13 16:47 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  11. 2026-09-13 12:57 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  12. 2026-09-13 08:56 UTCEG score recompute
  13. 2026-09-13 08:56 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  14. 2026-09-12 14:05 UTCEG score recompute
  15. 2026-09-12 14:05 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  16. 2026-09-11 14:53 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  17. 2026-09-10 09:35 UTCEPSS rescoreEPSS 0.5% · 39th percentile
  18. 2026-09-08 22:00 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  19. 2026-09-07 16:01 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  20. 2026-09-06 14:18 UTCEG score recompute
  21. 2026-09-06 14:18 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  22. 2026-09-06 13:47 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  23. 2026-09-06 04:52 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  24. 2026-09-05 23:48 UTCEG score recompute
  25. 2026-09-05 23:48 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  26. 2026-09-04 05:06 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  27. 2026-09-02 14:12 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  28. 2026-09-01 13:54 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  29. 2026-08-31 00:53 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  30. 2026-08-30 20:51 UTCEG score recompute
  31. 2026-08-30 20:51 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  32. 2026-08-30 19:17 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  33. 2026-08-30 16:50 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  34. 2026-08-30 11:19 UTCEG score recompute
  35. 2026-08-30 11:19 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  36. 2026-08-30 01:22 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  37. 2026-08-28 21:41 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  38. 2026-08-28 02:45 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  39. 2026-08-27 22:12 UTCEG score recompute
  40. 2026-08-27 22:12 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  41. 2026-08-27 14:25 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  42. 2026-08-27 03:15 UTCEG score recompute
  43. 2026-08-27 03:15 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  44. 2026-08-26 14:46 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  45. 2026-08-25 13:49 UTCEPSS rescoreEPSS 0.5% · 38th percentile
  46. 2026-08-25 13:38 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  47. 2026-08-25 04:57 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  48. 2026-08-25 00:55 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  49. 2026-08-24 20:54 UTCEG score recompute
  50. 2026-08-24 20:54 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  51. 2026-08-24 14:14 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  52. 2026-08-24 10:13 UTCEG score recompute
  53. 2026-08-24 10:13 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  54. 2026-08-24 04:07 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  55. 2026-08-23 23:27 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  56. 2026-08-23 19:25 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  57. 2026-08-23 15:23 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  58. 2026-08-23 11:21 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  59. 2026-08-23 07:19 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  60. 2026-08-23 03:17 UTCEG score recompute
  61. 2026-08-23 03:17 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  62. 2026-08-23 00:19 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  63. 2026-08-22 23:11 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  64. 2026-08-22 19:09 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  65. 2026-08-22 14:03 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  66. 2026-08-22 10:00 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  67. 2026-08-22 05:58 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  68. 2026-08-22 01:18 UTCEG score recompute
  69. 2026-08-22 01:18 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  70. 2026-08-21 23:49 UTCEPSS rescoreEPSS 0.3% · 28th percentile
  71. 2026-08-21 21:16 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  72. 2026-08-21 17:14 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  73. 2026-08-21 12:29 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  74. 2026-08-21 08:27 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8
  75. 2026-08-21 04:26 UTCGHSA enrichmentGHSA-m739-f9cm-66x2 · GitHub CVSS 9.8

Frequently asked(5)

What is CVE-2026-47898?
CVE-2026-47898 is a critical-severity vulnerability; its CVE record was 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 the CVE record for CVE-2026-47898 published?
The CVE record for CVE-2026-47898 was published on July 3, 2026. That is the record's publication date; the vulnerability itself may have been made public earlier. EchelonGraph's copy of the record carries a last-modified date of July 8, 2026; the record at its source may have been updated since.
Is CVE-2026-47898 actively exploited?
CVE-2026-47898 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.5% probability of exploitation in the next 30 days (38th percentile of EPSS-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?
The CVE record for CVE-2026-47898 names the fix: "Users are recommended to upgrade to version 4.8.0-beta00018, which fixes the issue." The vendor advisories EchelonGraph has for CVE-2026-47898 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

Explore the affected products and dependency analysis for CVE-2026-47898

Explore →

Is Your Infrastructure Affected by CVE-2026-47898?

EchelonGraph automatically scans your cloud infrastructure and maps CVE exposure using blast radius analysis.