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Vulnerabilities CVE-2026-20253

CVE-2026-20253

Medium
Open
KEV
TLP:CLEAR

Splunk Enterprise Missing Authentication for Critical Function Vulnerability

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Description

Splunk — Enterprise — Splunk Enterprise contains a missing authentication for critical function vulnerability which could allow an unauthenticated user to create or truncate arbitrary files through a PostgreSQL sidecar service endpoint.

Details

EPSS Score
96.94%

99.9th percentile

Confidence
100%
CISA KEV
Date Added
Jun 18, 2026
Patch Due
Jun 21, 2026
Required Action
Apply mitigations in accordance with vendor instructions, ensuring compliance with CISA’s BOD 26-04 Prioritizing Security Updates Based on Risk (see URL in Notes) guidance and CISA’s “Forensics Triage Requirements” (see URL in Notes). Follow applicable BOD 26-04 guidance for cloud services or discontinue use of the product if mitigations are unavailable. Stakeholders are responsible for evaluating each asset's internet exposure and ensuring adherence to BOD 26-04 patching guidelines.
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