Splunk Security Updates – 21 May 2026

Splunk has released security updates to fix several vulnerabilities across Splunk AI Toolkit, Splunk Enterprise, and Splunk Cloud Platform.

The addressed vulnerabilities could allow the remote attacker to obtain sensitive information or perform denial-of-service attacks on the affected systems.

Sample of the addressed vulnerabilities:

1. Splunk Enterprise and Splunk Cloud Platform Sensitive Information Disclosure Vulnerability (CVE-2026-20239):

  • CVSS: 7.5
  • Attack Vector: Network
  • Attack Complexity: High
  • Privileges Required: Low
  • User Interaction: None
  • Consequences: Obtain Information

2. Splunk Enterprise and Splunk Cloud Platform Denial of Service Vulnerability (CVE-2026-20240):

  • CVSS: 7.1
  • Attack Vector: Network
  • Attack Complexity: Low
  • Privileges Required: Low
  • User Interaction: None
  • Consequences: Denial of Service
Vulnerabilities
  • CVE-2026-20238
  • CVE-2026-20239
  • CVE-2026-20240
Mitigations

The enterprise should deploy this patch as soon as the testing phase is completed.

Splunk Security Updates

References