Severity
High
Analysis Summary
CVE-2026-20253
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.
Impact
- Gain Access
Indicators of Compromise
CVE
CVE-2026-20253
Affected Vendors
- Cisco
Affected Products
- Cisco Splunk Enterprise 10.0.0 - 10.0.7
- Cisco Splunk Enterprise 10.2.0 - 10.2.4
Remediation
Refer to Cisco Splunk Security Advisory for patch, upgrade, or suggested workaround information.