CVE-2026-76266

Local Privilege Escalation through Linux Package Upgrades in Splunk Enterprise

State: Published
Severity: 7.7 High
Published: Oct 7, 2026
Updated: Oct 9, 2026
Reserved: Aug 19, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	7.7 High	CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:C/C:H/I:H/A:H	cisco

Weaknesses

CWE-269 The software does not properly assign, modify, track, or check privileges for an actor, creating an unintended sphere of control for that actor.

Affected Products

Product	Versions
Splunk EnterpriseSplunk	10.4 to before 10.4.3Affected 10.2 to before 10.2.7Affected 10.0 to before 10.0.10Affected 9.4 to before 9.4.15Affected

References

https://advisory.splunk.com/advisories/SVD-2026-1001

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