CVE-2026-76266

Summary

A local user with command execution privileges on a Splunk Enterprise system can manipulate upgrade scripts to execute arbitrary commands as root during package upgrades. This allows privilege escalation from the Splunk user to root through trusted installation content during upgrade operations.

Exploitability

Exploitation requires a local user who can run commands as the Splunk user account, followed by an upgrade operation that triggers the vulnerable package maintainer script, making it moderately difficult but not highly complex to achieve.

Blast radius

If exploited, this vulnerability could allow attackers to gain full root access to Splunk servers, potentially compromising all system resources and data accessible to the Splunk installation, with impact extending to other services running on the same host.

Detection

No reliable host or network indicator is derivable from the published description.

Prioritized remediation

Upgrade to Splunk Enterprise 10.4.3, 10.2.7, 10.0.10, or 9.4.15 immediately to remediate this privilege escalation vulnerability.

Analysis generated locally by garnet-coder (no data left the box). AI-assisted — verify against primary sources before acting.