CVE-2026-20256

MEDIUMPre-NVD 5.75.7—
EchelonGraph scoreMEDIUM 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
5.7EG
EchelonGraph verdictMonitorLow exploitation likelihood right now — keep watching.
  • Lower severity and no public exploit yet
CISA-KEV: Not listedEPSS PROB: 0%CVSS: 5.7Exploit: None knownExposed: 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(medium)
EG Risk
30(Track)
EG Risk 30/100SSVC: 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
Severity57% × 45%
Exploitation0% × 40%
Automatability30% × 15%
Action: Routine — remediate on your standard cadence.
EPSS PROB
0%
EPSS %ILE
30%
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 8× in last 7d / 39× 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 204 total refreshes for this CVE.

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

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 0% probability of exploitation in the next 30 days, which ranks it in the top 70.5% of all scored CVEs.
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

Explore the affected products and dependency analysis for CVE-2026-20256

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