CVE-2026-76266

High

Description

In Splunk Enterprise versions below 10.4.3, 10.2.7, 10.0.10, and 9.4.15 on Linux, a local user who can run commands as the user account running Splunk Enterprise could cause an affected Linux package upgrade to run attacker-controlled operating-system commands with root privileges. The vulnerability is possible because the Linux package maintainer script trusts existing Splunk Enterprise installation content when it performs upgrade operations with root privileges. The vulnerability requires an affected Linux package upgrade to occur after the local user modifies the installation. The local user should not be able to elevate privileges at will.

SeverityHigh
CVSS7.7
Exploit probability—
ProductSplunk
PublishedOct 7, 2026
First seenOct 7, 2026

How to fix

Update
  • splunk splunk9.4.15, 10.0.10, 10.2.7, 10.4.3 or later

Affected products

ProductAffected versionsFixed in
splunk splunk9.4.0 ≤ v < 9.4.15, 10.0.0 ≤ v < 10.0.10, 10.2.0 ≤ v < 10.2.7, 10.4.0 ≤ v < 10.4.39.4.15, 10.0.10, 10.2.7, 10.4.3

Check your version

Choose the product and enter the version you run to see whether it falls in the affected range.

In the Intelligence 360 plan

Attack Surface Management

See the assets tied to your domains, the technologies they run and known vulnerabilities in one list.