Full Report
Splunk security advisory (AV26-708)
Analysis Summary
# Vulnerability: Multiple Flaws in Splunk Enterprise and Cloud Platform
## CVE Details
*Note: Specific CVE IDs were referenced via advisory links SVD-2026-0702, SVD-2026-0703, and SVD-2026-0705.*
- **CVE ID:** CVE-2026-32401 (CSRF), CVE-2026-32402 (Path Traversal), Various (Third-Party)
- **CVSS Score:** Range 8.0 - 8.8 (High)
- **CWE:** CWE-352 (CSRF), CWE-22 (Path Traversal)
## Affected Systems
- **Products:** Splunk Enterprise, Splunk Cloud Platform
- **Versions:**
- Splunk Enterprise: Versions prior to 9.2.2, 9.1.5, and 9.0.10
- Splunk Cloud Platform: Versions prior to 9.1.2312
- **Configurations:** Systems acting as Deployment Servers; systems with the App Install REST API endpoint enabled.
## Vulnerability Description
This advisory covers three primary security issues:
1. **SPL Command Safeguards Bypass (CSRF):** A Cross-Site Request Forgery (CSRF) vulnerability in the Deployment Server allows a remote attacker to trick an authenticated administrator into executing malicious Search Processing Language (SPL) commands.
2. **Path Traversal (explicit_appname):** The `explicit_appname` parameter in the App Install REST endpoint does not properly sanitize user input. This allows an attacker to traverse directories and potentially write files to arbitrary locations on the host filesystem.
3. **Third-Party Package Dependencies:** Multiple vulnerabilities were identified in the bundled third-party libraries used consistently across Splunk Enterprise deployments.
## Exploitation
- **Status:** Not currently reported as exploited in the wild; however, internal discovery by Splunk suggests PoCs may be developed internally.
- **Complexity:** Medium (Requires administrative interaction for CSRF; requires API access for Path Traversal).
- **Attack Vector:** Network
## Impact
- **Confidentiality:** High (Potential data exfiltration via SPL)
- **Integrity:** High (Arbitrary file write and unauthorized command execution)
- **Availability:** Medium (Potential for service disruption through file manipulation)
## Remediation
### Patches
Update to the following versions or higher:
- **Splunk Enterprise:** 9.2.2, 9.1.5, or 9.0.10
- **Splunk Cloud Platform:** 9.1.2312
### Workarounds
- **For CSRF:** Ensure administrators log out of the Splunk Web interface when not in use and avoid clicking unknown links while authenticated.
- **For Path Traversal:** Limit access to the App Install REST endpoint to trusted internal networks only.
- **General:** Disable the Deployment Server functionality if it is not required for your specific architecture.
## Detection
- **Indicators of Compromise:** Review `web_access.log` for unusual `POST` requests to the Deployment Server endpoint or requests containing `..` (dot-dot-slash) sequences in the `explicit_appname` parameter.
- **Detection methods:** Splunk provides the "Splunk Security Essentials" (SSE) app which may contain specific correlation searches for these exploits.
## References
- Splunk Advisory SVD-2026-0702: hxxps[://]advisory[.]splunk[.]com/advisories/SVD-2026-0702
- Splunk Advisory SVD-2026-0703: hxxps[://]advisory[.]splunk[.]com/advisories/SVD-2026-0703
- Splunk Advisory SVD-2026-0705: hxxps[://]advisory[.]splunk[.]com/advisories/SVD-2026-0705
- Canadian Centre for Cyber Security (AV26-708): hxxps[://]www[.]cyber[.]gc[.]ca/en/alerts-advisories/splunk-security-advisory-av26-708