CVE ID
CVE-2026-20253
Vulnerability Name
Splunk Enterprise Missing Authentication for Critical Function Vulnerability
- Project: Splunk
- Product: Enterprise
Date
- Date Added: 2026-06-18
- Due Date: 2026-06-21
Description
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.
Known To Be Used in Ransomware Campaigns?
Unknown
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.
Additional Notes
https://advisory.splunk.com/advisories/SVD-2026-0603 ; BOD 26-04: https://www.cisa.gov/news-events/directives/bod-26-04-prioritizing-security-updates-based-risk ; Forensics Triage Requirements: https://www.cisa.gov/news-events/directives/bod-26-04-implementation-guidance-prioritizing-security-updates-based-risk ; https://nvd.nist.gov/vuln/detail/CVE-2026-20253
Related Security News
- CISA: Splunk Enterprise flaw actively exploited, patch by Sunday
- Unauthenticated RCE in Splunk Enterprise under active attack (CVE-2026-20253)
