CVE-2026-63140

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-07-21. a secondary CVSS source baseline 6.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
6.5EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 6.5Exploit: None knownExposed: 0

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

Reachable Assertion (CWE-617) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). A specially crafted search request containing a null value in a specific query clause causes an internal assertion to be raised during query parsing. Because Elasticsearch treats assertion failures as fatal errors, this terminates the affected node process. A low-privileged authenticated user with read access to at least one index can exploit this condition with a single request to cause a node to terminate, disrupting search availability. In a single-node deployment this fully stops Elasticsearch; in a multi-node cluster it reduces cluster capacity for each affected node.

CVSS v3
6.5
EG Score
6.5(medium)
EG Risk
29(Track)
EG Risk 29/100SSVC: 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
Severity65% × 45%
Exploitation0% × 40%
Automatability0% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
15%
KEV
Not listed

Published

July 21, 2026

Last Modified

August 7, 2026

Advisory Details (1)

Auto-updated Jul 21, 2026
No patch confirmed yet.
generic

Elasticsearch 8.19.19, 9.3.8, 9.4.4 Security Update (ESA-2026-64) - Security Announcements - Discuss the Elastic Stack

https://discuss.elastic.co/t/elasticsearch-8-19-19-9-3-8-9-4-4-security-update-esa-2026-64/388565

Vendor Advisories for CVE-2026-63140(2)

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 14× in last 7d / 69× 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 137 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-63140?
CVE-2026-63140 is a medium vulnerability published on July 21, 2026. Reachable Assertion (CWE-617) in Elasticsearch can lead to denial of service via Input Data Manipulation (CAPEC-153). A specially crafted search request containing a null value in a specific query clause causes an internal assertion to be raised during query parsing. Because Elasticsearch treats…
When was CVE-2026-63140 disclosed?
CVE-2026-63140 was first published in the National Vulnerability Database on July 21, 2026, with the most recent update on August 7, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-63140 actively exploited?
CVE-2026-63140 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 84.9% of all scored CVEs.
What is the CVSS score of CVE-2026-63140?
CVE-2026-63140 has a CVSS v3 base score of 6.5 (NVD).
How do I remediate CVE-2026-63140?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-63140, 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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