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TI-2026-16444 Aliases CVE-2026-20253GHSA-xgm5-jh99-wc4v

Unauthenticated Arbitrary File Creation and Truncation in a PostgreSQL Sidecar Service Endpoint in Splunk Enterprise

Priority CRITICAL 100Exploited in the wildCWE-306Published · Updated

Key facts

Attack vector
Network
Privileges required
None
User interaction
None
Attack complexity
Low
Impact type
Security bypass
Confidentiality · integrity · availability
High · High · High
Fix status
Fixed

Attack profile from CVSS 3.1 · CNA. Fix status from CNA. Impact type from CWE-306.

Summary

In Splunk Enterprise 10.2 versions below 10.2.4 and 10 versions below 10.0.7, an unauthenticated user could create or truncate arbitrary files through a PostgreSQL sidecar service endpoint. The vulnerability exists because the PostgreSQL sidecar service endpoint lacks authentication controls, allowing any network-reachable user to invoke file operations without credentials. Splunk Enterprise versions 9.4 and earlier are not affected. If you cannot immediately upgrade to a fixed version, you can mitigate this vulnerability by disabling the PostgreSQL sidecar service.

Why it matters now

Exploitation Active In CISA KEV since 2026-06-18CISA due date 2026-06-21
EPSS 0.96939 99th percentileScored 2026-11-07
Public exploit Yes 1 exploit referenceTagged by NVD
Fix Fixed Splunk Enterprise (Splunk): 10.2.4, 10.0.7

SSVC decision points

CISA ADP · SSVC 2.0.3

Exploitation
Active
Automatable
Yes
Technical impact
Total

The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.

Affected products

VendorProductAffected versionsFixed inStatusSource
SplunkSplunk Enterprise10.2 to before 10.2.4; 10.0 to before 10.0.710.2.4, 10.0.7Patch availableCNA
  • Splunk Enterprise VendorSplunk Affected 10.2 to before 10.2.4; 10.0 to before 10.0.7 Fixed in 10.2.4, 10.0.7 Patch available CNA

CPE configurations NVD · 1

CPEVersionsRoleVendor
cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:*10.0.0 to before 10.0.7; 10.2.0 to before 10.2.4VulnerableSplunk
  • cpe:2.3:a:splunk:splunk:*:*:*:*:enterprise:*:*:* Versions 10.0.0 to before 10.0.7; 10.2.0 to before 10.2.4 Vulnerable ·Splunk

Remediation

  • Fix · CNA Splunk Enterprise (Splunk) Fixed in 10.2.4, 10.0.7

Fixed in the same release

Records fixed by the same vendor advisory or release, as the CNA lists them.

  • Release ·

    Splunk Enterprise 10.0.7, 10.2.4

    2 records Highest priority Priority CRITICAL 1 CRITICAL, 1 LOW

    Other records, highest priority first

    • TI-2026-16450 Improper Access Control in Splunk EnterprisePriority LOW 24
    Show all 2 records →

Timeline

  1. 2026-06-18 Added to CISA KEV
  2. 2026-10-02 Threatist record created from CVE-2026-20253
  3. 2026-10-03 Alias added: GHSA-xgm5-jh99-wc4v

References

Exploit 1

Advisory 1

  • TI-2014-00154 The (1) TLS and (2) DTLS implementations in OpenSSL 1.0.1 before 1.0.1g do not properly… KEVCVSS 3.1HIGH 7.5
  • TI-2023-24841 Remote code execution (RCE) in Splunk Enterprise through Insecure XML Parsing CVSS 3.1HIGH 8.8
  • TI-2023-15979 ‘edit_user’ Capability Privilege Escalation CVSS 3.1HIGH 8.8
  • TI-2024-30707 Remote Code Execution (RCE) due to insecure session storage configuration in Splunk Enterprise on Windows CVSS 3.1HIGH 8.8
  • TI-2022-21345 Reflected Cross-Site Scripting via the radio template in Splunk Enterprise CVSS 3.1HIGH 8.8
  • TI-2024-24537 Path Traversal on the “/modules/messaging/“ endpoint in Splunk Enterprise on Windows CVSS 3.1HIGH 7.5
See all 297 →

Sources

This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences