CVE-2026-76356 Authentication Bypass through IP Address Spoofing in the Automation Broker in Splunk SOAR
Unauthenticated attackers can spoof IP headers to bypass authentication and execute arbitrary code on Splunk SOAR hosts.
- Exploited in the wild
- Not known
- Login needed
- Not needed
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-76356?
CVE-2026-76356 is a high-severity authentication bypass vulnerability in Splunk SOAR, published on 19 Aug 2026. An attacker can exploit it over the internet without logging in, with no action from the victim.
Official description
In Splunk SOAR versions below 8.6.0, an unauthenticated user could spoof the source IP address in a crafted request to an Automation Broker notification endpoint and execute arbitrary code on the Splunk SOAR host. The vulnerability is possible because the Splunk SOAR Automation Broker trusts a client-supplied source IP address header as proof that the request originates from the local system. Successful exploitation can expose all relevant data, affect system integrity, and disrupt service availability. For more information see About Splunk SOAR Automation Broker (https://help.splunk.com/en/splunk-soar/splunk-automation-broker/about-splunk-soar-automation-broker/about-splunk-soar-automation-broker) in the Splunk documentation.
Weakness: CWE-290
Which versions are affected by CVE-2026-76356?
It affects 1 product.
Products include Splunk Soar.
How do I fix CVE-2026-76356?
No fix has been published for CVE-2026-76356 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-76356 being exploited?
There is no known exploitation of CVE-2026-76356 in the wild and no public exploit code.
Other vulnerabilities in Splunk SOAR
- CVE-2023-3997 Unauthenticated Log Injection In Splunk SOAR
- CVE-2026-76357 Remote Code Execution (RCE) through Path Traversal in the REST API in Splunk SOAR
- CVE-2026-76362 Improper Certificate Validation through CyberArk Vault Privileged Access Manager in Splunk SOAR
- CVE-2026-76358 Path Traversal through App Installation Tar Extraction in Splunk SOAR
- CVE-2026-76359 Path Traversal through Universal Forwarder Installer Archive Extraction in Splunk SOAR
Sources
Also known as GHSA-q6gh-xv9g-wf4c.