CVE-2026-76354: Path Traversal through Search Head Clustering in Splunk Enterprise

DescriptionCVE.org

In Splunk Enterprise versions below 10.4.2, 10.2.6, 10.0.9, and 9.4.14, a user who does not hold the "admin" or "power" Splunk roles could affect system integrity and availability by sending a crafted Representational State Transfer (REST) API request that deletes or temporarily overwrites files writable by the user account running Splunk Enterprise processes on a non-captain search head cluster member. The vulnerability is possible because Search Head Clustering bundle replication does not validate the name of a replicated bundle file or neutralize NUL bytes before constructing the member bundle path. For more information see About search head clustering (https://help.splunk.com/en/splunk-enterprise/administer/distributed-search/10.4/overview-of-search-head-clustering/about-search-head-clustering), Define roles on the Splunk platform with capabilities (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/10.4/manage-splunk-platform-users-and-roles/define-roles-on-the-splunk-platform-with-capabilities), and Secure Splunk Enterprise service accounts (https://help.splunk.com/en/splunk-enterprise/administer/manage-users-and-security/9.0/install-splunk-enterprise-securely/secure-splunk-enterprise-service-accounts) in the Splunk documentation.

• Splunk · Splunk Enterprisefrom 10.4 before 10.4.2; from 10.2 before 10.2.6; from 10.0 before 10.0.9; from 9.4 before 9.4.14

Exploitation

Unlikely (under 1%). EPSS under 1%, or no score yet.

CISA KEV

Not listed

Public check

No public nuclei template

Weakness

Improper Neutralization of Null Byte or NUL Character · Injection and Smuggling

Vendor

Splunk

Published

August 2026

Band

Unlikely (under 1%), August 2026

• NVD entrynvd.nist.gov
• CVE recordcve.org
• Weakness CWE-158cwe.mitre.org
• advisory.splunk.com/advisories/SVD-2026-0801advisory.splunk.com