CVE-2026-76356: This attack-focused weakness is caused by improperly implemented authentication schemes that are subject to spoofing attacks. in Splunk Splunk SOAR
Description
CVE-2026-76356 is a high-severity vulnerability in Splunk SOAR versions prior to 8.6.0. It allows an unauthenticated attacker to spoof the source IP address in requests to the Automation Broker notification endpoint, leading to arbitrary code execution on the host. This occurs because the Automation Broker trusts a client-supplied source IP header as proof of local origin. Exploitation can compromise data confidentiality, system integrity, and availability.
CVSS v3.1
Score 8.1high
Affected software
Splunk
Splunk SOAR
pkg:github/splunk/splunk-soarRun on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.
AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In Splunk SOAR versions below 8.6.0, the Automation Broker component improperly trusts a client-supplied source IP address header to verify that requests originate from the local system. An unauthenticated attacker can craft requests with a spoofed source IP to the Automation Broker notification endpoint, resulting in arbitrary code execution on the Splunk SOAR host. This vulnerability enables full compromise of the system, including data exposure, integrity violations, and service disruption.
Potential Impact
Successful exploitation allows an unauthenticated attacker to execute arbitrary code on the Splunk SOAR host, potentially exposing all relevant data, compromising system integrity, and causing denial of service. The vulnerability affects confidentiality, integrity, and availability of the affected system.
Mitigation Recommendations
A fix is available in Splunk SOAR version 8.6.0 and later. Users should upgrade to version 8.6.0 or higher to remediate this vulnerability. No additional mitigations are specified in the vendor advisory.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- cisco
- Date Reserved
- 2026-08-19T12:02:03.628Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6a86225bacd9273b49a7019f
Added to database: 08/19/2026, 21:38:35 UTC
Last enriched: 09/11/2026, 03:32:23 UTC
Last updated: 10/04/2026, 10:02:29 UTC
Views: 25
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