Full Report
Splunk security advisory (AV26-147)
Analysis Summary
# Vulnerability: Multiple Vulnerabilities in Splunk Enterprise, Cloud, and Forwarder Products
## CVE Details
- **CVE ID:** Multiple (Refer to Splunk Advisory portal for specific identifiers)
- **CVSS Score:** Variable (Scores range across multiple advisories published in this cycle)
- **CWE:** Multiple (Includes common weaknesses associated with Splunk components and DB Connect)
## Affected Systems
- **Products:** Splunk Enterprise, Splunk Cloud Platform, Splunk Universal Forwarder, and Splunk DB Connect.
- **Versions:**
- Splunk Enterprise: Multiple versions
- Splunk Cloud Platform: Multiple versions
- Splunk Universal Forwarder: Multiple versions
- Splunk DB Connect: Versions prior to 4.2.0
- **Configurations:** Systems running DB Connect or those utilizing specific Enterprise/Cloud features addressed in the February 2026 update cycle.
## Vulnerability Description
This advisory represents a collective update addressing multiple security flaws across the Splunk ecosystem. Key focus areas include vulnerabilities within the **Splunk DB Connect** app (prior to version 4.2.0) and core service flaws in **Splunk Enterprise** and **Cloud** platforms. While technical specifics for each individual CVE vary, they generally involve logic flaws, potential for unauthorized access, or remote code execution risks inherent in data processing and database connectivity modules.
## Exploitation
- **Status:** Historically, Splunk vulnerabilities are high-value targets; check vendor site for specific "in the wild" status for individual CVEs.
- **Complexity:** Low to Medium (depending on the specific CVE)
- **Attack Vector:** Network (Most commonly exploited via the web management interface or API endpoints)
## Impact
- **Confidentiality:** High (Potential access to indexed data and configuration files)
- **Integrity:** High (Potential for unauthorized modification of logs or system settings)
- **Availability:** High (Potential for service disruption or Denial of Service)
## Remediation
### Patches
- **Splunk DB Connect:** Upgrade to version **4.2.0** or higher.
- **Splunk Enterprise/Cloud/Universal Forwarder:** Refer to the official Splunk Advisory portal for specific version-mapping based on your current deployment branch (e.g., 9.x, 8.x).
### Workarounds
- Restrict access to the Splunk Management Port (default 8089) and Web Port (default 8000) using firewalls or ACLs.
- Disable unused apps and modular inputs (specifically DB Connect if an upgrade is not immediate).
## Detection
- **Indicators of Compromise:** Monitor for unusual login activity from unknown IP addresses and unexpected execution of system commands by the Splunk service account.
- **Detection methods and tools:** auditd/Sysmon logs tracking `splunkd` child processes; Splunk "Internal" logs (`index=_internal`) for unauthorized configuration changes.
## References
- Splunk Security Advisories: hxxps[://]advisory[.]splunk[.]com/
- CCCS Advisory (AV26-147): hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/splunk-security-advisory-av26-147