CVE-2026-20256

MEDIUMPre-NVD 5.75.7—
EchelonGraph scoreHIGH confidence

Score 5.7 from GitHub Security Advisory published 2026-06-10. a secondary CVSS source baseline 5.7; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
5.7
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS: 0%CVSS: 5.7Exploit: 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 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could cause data exfiltration through classic dashboards by redirecting a victim to an external site using a protocol-relative URL in a drill-down link.The vulnerability exists because the URL classifier in classic dashboards only recognizes http:// and https:// schemes when checking for external URLs. Protocol-relative URLs such as //attacker.com bypass this check entirely, and Splunk Web does not show the external-navigation warning dialog to the victim.

CVSS v3
5.7
EG Score
5.7(high)
EPSS
16.5%
KEV
Not listed

Published

June 10, 2026

Last Modified

June 15, 2026

Advisory Details (1)

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

SVD-2026-0606 | Splunk Vulnerability Disclosure

https://advisory.splunk.com/advisories/SVD-2026-0606

Vendor Advisories for CVE-2026-20256(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 20× in last 7d / 87× 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.

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

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-20256?
CVE-2026-20256 is a medium vulnerability published on June 10, 2026. In Splunk Enterprise versions below 10.2.4, 10.0.7, 9.4.12, and 9.3.13, and Splunk Cloud Platform versions below 10.3.2512.13, 10.2.2510.15, 10.1.2507.23, and 9.3.2411.132, a low-privileged user that does not hold the 'admin' or 'power' Splunk roles could cause data exfiltration through classic…
When was CVE-2026-20256 disclosed?
CVE-2026-20256 was first published in the National Vulnerability Database on June 10, 2026, with the most recent update on June 15, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-20256 actively exploited?
CVE-2026-20256 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 16.5% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-20256?
CVE-2026-20256 has a CVSS v3 base score of 5.7 (NVD).
How do I remediate CVE-2026-20256?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20256, 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

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