CVE-2026-76258

MEDIUMPre-NVD 6.56.5—
EchelonGraph scoreMEDIUM confidence

Score 6.5 from GitHub Security Advisory published 2026-08-20. 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: 0.3%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.

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.10, 3.9.24, and 3.8.71, a user who does not hold the "admin" or "power" Splunk roles could register an arbitrary companion app and cause Splunk Secure Gateway to forward mobile user requests, including tokens that compromise all relevant data available to the affected mobile user, to an attacker-controlled Uniform Resource Locator (URL). The vulnerability is possible because a hard-coded cryptographic key in the Splunk Secure Gateway companion app registration handler allows for arbitrary callback URL registration without restriction. For more information see Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.2/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities) in the Splunk documentation.

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
0.3%
EPSS %ILE
25th
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 19, 2026

Last Modified

August 26, 2026

Advisory Details (1)

Auto-updated Aug 19, 2026
No patch confirmed yet.
generic

SVD-2026-0801 | Splunk Vulnerability Disclosure

https://advisory.splunk.com/advisories/SVD-2026-0801

Vendor Advisories for CVE-2026-76258(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 15× in last 7d / 71× 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 125 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-76258?
CVE-2026-76258 is a medium vulnerability published on August 19, 2026. In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, and Splunk Secure Gateway versions below 3.10.10, 3.9.24, and 3.8.71, a user who does not hold the "admin" or "power" Splunk roles could register an arbitrary companion app and cause Splunk Secure Gateway to forward mobile user…
When was CVE-2026-76258 disclosed?
CVE-2026-76258 was first published on August 19, 2026, with the most recent update on August 26, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76258 actively exploited?
CVE-2026-76258 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.3% probability of exploitation in the next 30 days (25th percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76258?
CVE-2026-76258 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-2026-76258?
No fix for CVE-2026-76258 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-2026-76258 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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