CVE-2026-76404 — CRITICAL (9.1)

Vulnerability Description

In Splunk MCP Server app versions below 1.2.1, a user who holds the "admin" Splunk role could execute arbitrary commands on the underlying operating system. The vulnerability is possible because of missing input validation in the app's credential management component, which deserializes stored data without checking whether the content is of the expected type.

CVSS Score

9.1

CRITICAL

CVSS:3.1/AV:N/AC:L/PR:H/UI:N/S:C/C:H/I:H/A:H

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

HIGH

User Interaction

NONE

Scope

CHANGED

Confidentiality

HIGH

Integrity

HIGH

Availability

HIGH

Related Weaknesses (CWE)

CWE-502

References

https://advisory.splunk.com/advisories/SVD-2026-0808

FAQ

What is CVE-2026-76404?

CVE-2026-76404 is a vulnerability with a CVSS score of 9.1 (CRITICAL). In Splunk MCP Server app versions below 1.2.1, a user who holds the "admin" Splunk role could execute arbitrary commands on the underlying operating system. The vulnerability is possible because of mi...

How severe is CVE-2026-76404?

CVE-2026-76404 has been rated CRITICAL with a CVSS base score of 9.1/10. This is considered a critical vulnerability requiring immediate attention.

Is there a patch for CVE-2026-76404?

Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.