CVE-2026-20253

CVSS 9.8 · CRITICAL
EPSS p21
Lower risk — in the top 79% least-likely-to-be-exploited CVEs.
No patch reference
No patch/mitigation in references

Published 6/10/2026 · updated 6/10/2026 · CWE-306

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Summary

In Splunk Enterprise versions below 10.2.4 and 10.0.7, and Splunk Cloud Platform versions below 10.4.2604.3 and 10.2.2510.14, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint.<br><br>The vulnerability exists because the PostgreSQL sidecar service endpoint lacks authentication controls, allowing any network-reachable user to invoke file operations without credentials.

CVSS 9.8CRITICAL

9.8 / 10
  • AV: Network
  • AC: Low complexity
  • PR: No privileges
  • UI: No user interaction
  • S: Scope unchanged
  • C: Confidentiality: High
  • I: Integrity: High
  • A: Availability: High

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H

EPSS exploitation probability

0.1%

Percentile p21 Lower risk — in the top 79% least-likely-to-be-exploited CVEs.

Timeline

  1. Jun 10, 2026 · Disclosed / published in NVD
  2. Jun 10, 2026 · Intel last updated

Intel sources

Which upstream feeds returned data for this CVE, and when they were last fetched.

  • NVD· 50 days ago
  • CVE.org· no data
  • FIRST EPSS· 50 days ago
  • CISA KEV· no data
  • OSV· 50 days ago

References

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