CVE-2026-76351

HIGHPre-NVD 8.88.8—
EchelonGraph scoreMEDIUM confidence

Score 8.8 from GitHub Security Advisory (severity: HIGH) published 2026-08-20. A secondary CVSS source baseline 8.8; sources differ by 0.0.

Triggered by: GitHub Security Advisory CVSS
Sources: epss, ghsa, secondary
Trending — 3 sources updated this week
8.8EG
EchelonGraph verdictPlan mitigationSerious severity, but no confirmed exploitation yet.
  • High severity, but no confirmed exploitation yet
CISA-KEV: Not listedEPSS PROB: 0.4%CVSS: 8.8Exploit: 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 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the "admin" or "power" Splunk roles could use crafted report notification data to cause Splunk Secure Gateway to send a request to the Splunk Enterprise Representational State Transfer (REST) API using a system-level session token and modify the Splunk platform configuration. The user could then obtain a session token without a password and use it to access all relevant data and affect system integrity. The vulnerability is possible because Splunk Secure Gateway does not validate decoded report notification identifiers before using them to construct requests to the Splunk Enterprise REST API.

CVSS v3
8.8
EG Score
8.8HIGHmedium confidence
EG Risk
40
EG Risk 40/100CISA 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
Severity88% × 45%
Exploitation0% × 40%
Automatability0% × 15%
CISA SSVC: Track at low or medium mission impact; Track* at high (mission-essential systems).
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
0.4%
EPSS %ILE
33rd
KEV
Not listed

CISA SSVCTrack at low or medium mission impact; Track* at high (mission-essential systems).

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 total (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 21, 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-2026-76351(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 23× in last 7d / 109× 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 187 total refreshes for this CVE.

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

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Frequently asked(5)

What is CVE-2026-76351?
CVE-2026-76351 is a high 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 3.10.9, 3.9.23, and 3.8.70, a user who does not hold the "admin" or "power" Splunk roles could use crafted report notification data to cause Splunk Secure Gateway to send a request to…
When was CVE-2026-76351 disclosed?
CVE-2026-76351 was first published on August 19, 2026, with the most recent update on August 21, 2026. EchelonGraph re-ingests CVE updates from NVD on a 2-hour cycle, so this page reflects the latest published state.
Is CVE-2026-76351 actively exploited?
CVE-2026-76351 is not currently on CISA's Known Exploited Vulnerabilities catalog. FIRST EPSS estimates a 0.4% probability of exploitation in the next 30 days (33rd percentile of EPSS-scored CVEs).
What is the CVSS score of CVE-2026-76351?
CVE-2026-76351 has a CVSS base score of 8.8 (a secondary CVSS source that NVD displays; NVD's own analysis pending).
How do I remediate CVE-2026-76351?
No fix for CVE-2026-76351 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-2026-76351 are linked in the Vendor Advisories panel on this page.

Dependency Blast Radius

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