CVE-2026-20239

HIGHNVD 7.57.5—
EchelonGraph scoreMEDIUM confidence

Score 7.5 from GitHub Security Advisory (severity: HIGH) published 2026-05-20. NVD baseline CVSS 7.5; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, nvd
7.5
EchelonGraph verdictPlan a fixSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS: 0%CVSS: 7.5Exploit: NoneExposed: 0

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

In Splunk Enterprise versions below 10.2.2 and 10.0.5, and Splunk Cloud Platform versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13, a user with a role that has access to the _internal index could view session cookies and response bodies that contain sensitive data.

CVSS v3
7.5
EG Score
7.5(medium)
EPSS
38.4%
KEV
Not listed

Published

May 20, 2026

Last Modified

May 21, 2026

Advisory Details (1)

Auto-updated Jun 7, 2026
No patch confirmed yet.
generic

SVD-2026-0503 | Splunk Vulnerability Disclosure

https://advisory.splunk.com/advisories/SVD-2026-0503

Vendor Advisories for CVE-2026-20239(1)

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

Data Freshness Timeline

(refreshed 9× in last 7d / 72× 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 163 total refreshes for this CVE.

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

Frequently asked(5)

What is CVE-2026-20239?
CVE-2026-20239 is a high vulnerability published on May 20, 2026. In Splunk Enterprise versions below 10.2.2 and 10.0.5, and Splunk Cloud Platform versions below 10.3.2512.8, 10.2.2510.11, 10.1.2507.21, and 10.0.2503.13, a user with a role that has access to the _internal index could view session cookies and response bodies that contain sensitive data.
When was CVE-2026-20239 disclosed?
CVE-2026-20239 was first published in the National Vulnerability Database on May 20, 2026, with the most recent update on May 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20239 actively exploited?
CVE-2026-20239 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 38.4% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-20239?
CVE-2026-20239 has a CVSS v3 base score of 7.5 (NVD).
How do I remediate CVE-2026-20239?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20239, 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

Explore the affected products and dependency analysis for CVE-2026-20239

Explore →

Is Your Infrastructure Affected by CVE-2026-20239?

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

Start Free Scan →Browse All CVEs