CVE-2026-20255

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 craft a malicious classic dashboard that exfiltrates sensitive data to an external server.

The vulnerability exists because URL validation on the external content dialog is incomplete, which can allow for requests to untrusted domains when a user interacts with a crafted dashboard.

CVSS v3
5.7
EG Score
5.7(high)
EPSS
15.6%
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-2026-0605 | Splunk Vulnerability Disclosure

https://advisory.splunk.com/advisories/SVD-2026-0605

Vendor Advisories for CVE-2026-20255(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 22× in last 7d / 88× 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 17:22 UTCEG score recompute
  4. 2026-07-05 17:22 UTCGHSA enrichment
  5. 2026-07-05 02:30 UTCEPSS rescore
  6. 2026-07-05 02:30 UTCEPSS rescore
  7. 2026-07-04 19:21 UTCEG score recompute
  8. 2026-07-04 19:21 UTCGHSA enrichment
  9. 2026-07-04 06:31 UTCEPSS rescore
  10. 2026-07-03 21:01 UTCEG score recompute
  11. 2026-07-03 21:01 UTCGHSA enrichment
  12. 2026-07-02 23:06 UTCEG score recompute
  13. 2026-07-02 23:06 UTCGHSA enrichment
  14. 2026-07-02 01:11 UTCEG score recompute
  15. 2026-07-02 01:11 UTCGHSA enrichment
  16. 2026-07-01 15:06 UTCEPSS rescore
  17. 2026-07-01 15:06 UTCEPSS rescore
  18. 2026-07-01 03:15 UTCEG score recompute
  19. 2026-07-01 03:15 UTCGHSA enrichment
  20. 2026-06-30 23:22 UTCEPSS rescore
  21. 2026-06-30 05:19 UTCEG score recompute
  22. 2026-06-30 05:19 UTCGHSA enrichment
  23. 2026-06-29 14:06 UTCEPSS rescore
  24. 2026-06-29 06:47 UTCEG score recompute
  25. 2026-06-29 06:47 UTCGHSA enrichment
Show 63 more
  1. 2026-06-28 14:07 UTCEPSS rescore
  2. 2026-06-28 08:05 UTCEG score recompute
  3. 2026-06-28 08:05 UTCGHSA enrichment
  4. 2026-06-28 04:56 UTCEPSS rescore
  5. 2026-06-28 04:56 UTCEPSS rescore
  6. 2026-06-27 10:10 UTCEG score recompute
  7. 2026-06-27 10:10 UTCGHSA enrichment
  8. 2026-06-27 03:08 UTCEPSS rescore
  9. 2026-06-26 12:14 UTCEG score recompute
  10. 2026-06-26 12:14 UTCGHSA enrichment
  11. 2026-06-25 13:49 UTCEPSS rescore
  12. 2026-06-25 12:07 UTCEG score recompute
  13. 2026-06-25 12:07 UTCGHSA enrichment
  14. 2026-06-24 14:12 UTCEG score recompute
  15. 2026-06-24 14:11 UTCGHSA enrichment
  16. 2026-06-24 14:05 UTCEPSS rescore
  17. 2026-06-23 21:32 UTCEPSS rescore
  18. 2026-06-23 16:16 UTCEG score recompute
  19. 2026-06-23 16:16 UTCGHSA enrichment
  20. 2026-06-22 18:19 UTCEG score recompute
  21. 2026-06-22 18:19 UTCGHSA enrichment
  22. 2026-06-22 14:25 UTCEPSS rescore
  23. 2026-06-22 14:25 UTCEPSS rescore
  24. 2026-06-21 19:09 UTCEG score recompute
  25. 2026-06-21 19:09 UTCGHSA enrichment
  26. 2026-06-21 14:56 UTCEPSS rescore
  27. 2026-06-21 14:56 UTCEPSS rescore
  28. 2026-06-21 01:59 UTCEPSS rescore
  29. 2026-06-21 01:59 UTCEPSS rescore
  30. 2026-06-20 21:10 UTCEG score recompute
  31. 2026-06-20 21:10 UTCGHSA enrichment
  32. 2026-06-19 22:42 UTCEG score recompute
  33. 2026-06-19 22:42 UTCGHSA enrichment
  34. 2026-06-19 19:25 UTCEPSS rescore
  35. 2026-06-19 00:37 UTCEG score recompute
  36. 2026-06-19 00:37 UTCGHSA enrichment
  37. 2026-06-18 17:52 UTCEPSS rescore
  38. 2026-06-18 02:41 UTCEG score recompute
  39. 2026-06-18 02:41 UTCGHSA enrichment
  40. 2026-06-17 17:53 UTCEPSS rescore
  41. 2026-06-17 04:45 UTCEG score recompute
  42. 2026-06-17 04:45 UTCGHSA enrichment
  43. 2026-06-16 17:52 UTCEPSS rescore
  44. 2026-06-16 06:50 UTCEG score recompute
  45. 2026-06-16 06:50 UTCGHSA enrichment
  46. 2026-06-15 17:48 UTCEPSS rescore
  47. 2026-06-15 08:56 UTCEG score recompute
  48. 2026-06-15 08:55 UTCGHSA enrichment
  49. 2026-06-14 23:18 UTCEPSS rescore
  50. 2026-06-14 10:59 UTCEG score recompute
  51. 2026-06-14 10:59 UTCGHSA enrichment
  52. 2026-06-13 23:00 UTCEPSS rescore
  53. 2026-06-13 23:00 UTCEPSS rescore
  54. 2026-06-13 13:03 UTCEG score recompute
  55. 2026-06-13 13:03 UTCGHSA enrichment
  56. 2026-06-12 23:12 UTCEPSS rescore
  57. 2026-06-12 15:07 UTCEG score recompute
  58. 2026-06-12 15:07 UTCGHSA enrichment
  59. 2026-06-11 17:12 UTCEG score recompute
  60. 2026-06-11 17:12 UTCGHSA enrichment
  61. 2026-06-11 14:00 UTCEPSS rescore
  62. 2026-06-10 19:17 UTCEG score recompute
  63. 2026-06-10 19:17 UTCGHSA enrichment

Related CVEs(same CWE)

Frequently asked(5)

What is CVE-2026-20255?
CVE-2026-20255 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 craft a malicious classic dashboard that…
When was CVE-2026-20255 disclosed?
CVE-2026-20255 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-2026-20255 actively exploited?
CVE-2026-20255 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 15.6% percentile likelihood of exploitation in the next 30 days — higher percentiles indicate greater predicted risk.
What is the CVSS score of CVE-2026-20255?
CVE-2026-20255 has a CVSS v3 base score of 5.7 (NVD).
How do I remediate CVE-2026-20255?
Patch to the fixed version published by the affected vendor. Where vendor advisories exist for CVE-2026-20255, 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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