CVE-2026-72639

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-13. 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: 0.4%CVSS: 6.5Exploit: None knownExposed services: Not assessed

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

Elasticsearch does not enforce an upper bound on a user-supplied count accepted by a search highlighting option, and the allocation derived from that count is not accounted against any circuit breaker. An authenticated user holding only read privileges on a single searchable index can submit one small search request that causes the node to reserve an excessively large internal data structure. The allocation occurs before the existing highlighting safety limits are evaluated, so memory exhaustion raises a fatal error that terminates the Elasticsearch node process. This results in a denial of service for the affected node and degrades cluster routing and health. The defect is not volumetric and does not depend on the size of the indexed data, so a single request is sufficient.

CVSS v3
6.5
EG Score
6.5MEDIUMmedium confidence
EG Risk
29
EG Risk 29/100CISA SSVC

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%
CISA SSVC: Track at every mission impact level.
Action: No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.
EPSS PROB
0.4%
EPSS %ILE
34th
KEV
Not listed

CISA SSVCTrack at every mission impact level.

No fix is confirmed yet. Restrict network exposure of the affected system or apply the vendor's mitigation within your standard update timelines, and watch the vendor's advisory for the fix.

Exploitation none (CISA Vulnrichment) · Automatable no (CISA Vulnrichment) · Technical impact partial (CISA Vulnrichment). Mission impact is CISA's Mission & Well-being decision point, and only you can judge it: high means the affected system is essential to your organisation's mission, or its compromise could cause irreversible harm to people. CISA's decision table

Published

August 13, 2026

Last Modified

September 1, 2026

Advisory Details (1)

Auto-updated Aug 13, 2026
No patch confirmed yet.
generic

Elasticsearch 8.19.20, 9.4.5, 9.5.1 Security Update (ESA-2026-120) - Security Announcements - Discuss the Elastic Stack

https://discuss.elastic.co/t/elasticsearch-8-19-20-9-4-5-9-5-1-security-update-esa-2026-120/389503

Vendor Advisories for CVE-2026-72639(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 13× in last 7d / 64× 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 129 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-72639?
CVE-2026-72639 is a medium vulnerability published on August 13, 2026. Elasticsearch does not enforce an upper bound on a user-supplied count accepted by a search highlighting option, and the allocation derived from that count is not accounted against any circuit breaker. An authenticated user holding only read privileges on a single searchable index can submit one…
When was CVE-2026-72639 disclosed?
CVE-2026-72639 was first published on August 13, 2026, with the most recent update on September 1, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-72639 actively exploited?
CVE-2026-72639 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (34th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-72639?
CVE-2026-72639 has a CVSS base score of 6.5 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-72639?
No fix for CVE-2026-72639 is confirmed yet. Until one is published, restrict network exposure of the affected system or apply the vendor's mitigation — for example, keep it off the internet or limit it to trusted networks — and watch the vendor's advisory for the fix. The vendor advisories EchelonGraph has for CVE-2026-72639 are linked in the Vendor Advisories panel on this page.

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