CVE-2026-76356
CVE-2026-76356 is a high-severity vulnerability in Splunk Soar with a CVSS 3.x base score of 8.1. It is not currently listed as actively exploited by CISA, and its EPSS exploit-prediction score is low. The underlying weakness is classified as CWE-290.
Key facts
- Severity: High (CVSS 3.x base score 8.1)
- EPSS exploit prediction: 0% (30th percentile)
- Actively exploited: Not listed in CISA KEV
- Weakness: CWE-290
- Affected product: Splunk Soar
- Published:
- Last modified:
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.
Frequently asked questions
- What is CVE-2026-76356?
- 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.
- How severe is CVE-2026-76356?
- CVE-2026-76356 has a CVSS 3.x base score of 8.1, rated high severity. It is exploitable over network with high attack complexity, requires no privileges and no user interaction. Impact on confidentiality is high, integrity high, and availability high.
- Is CVE-2026-76356 being actively exploited?
- It is not currently listed in CISA's KEV catalog. Its EPSS exploit-prediction score is 0% (30th percentile), an estimate of the probability of exploitation in the next 30 days.
- What products are affected by CVE-2026-76356?
- CVE-2026-76356 primarily affects Splunk Soar. In total, 2 product configurations (CPEs) are listed as vulnerable; see the affected-products list for the exact versions.
- How do I fix CVE-2026-76356?
- Review the linked vendor and NVD advisories for patched versions and mitigations, then upgrade or apply the recommended workaround. Given its high severity, prioritise patching exposed systems.
- When was CVE-2026-76356 published?
- CVE-2026-76356 was published on 2026-08-19 and last updated on 2026-08-21.
References
Affected products (2)
- cpe:2.3:a:splunk:soar:*:*:*:*:cloud:*:*:*
- cpe:2.3:a:splunk:soar:*:*:*:*:on-premises:*:*:*
More vulnerabilities in Splunk Soar
- CVE-2023-3997 — High (CVSS 8.6): Splunk SOAR versions lower than 6.1.0 are indirectly affected by a potential vulnerability accessed through the…
- CVE-2026-76357 — High (CVSS 7.6): In Splunk SOAR versions below 8.6.0, an authenticated user with no role assigned could submit a crafted file path to…
- CVE-2026-76362 — High (CVSS 7.4): In Splunk SOAR versions below 8.6.0, an unauthenticated user who can observe or alter network traffic between Splunk…
- CVE-2026-76366 — Medium (CVSS 6.5): In Splunk SOAR versions below 8.6.0, a user with a valid Splunk SOAR account could use Representational State Transfer…
- CVE-2026-76365 — Medium (CVSS 6.5): In Splunk SOAR versions below 8.6.0, a user who holds the "Automation Engineer" Splunk SOAR role could run arbitrary…
- CVE-2026-76364 — Medium (CVSS 6.5): In Splunk SOAR versions below 8.6.0, a user who holds the "Automation Engineer" Splunk SOAR role could run arbitrary…
All CVEs affecting Splunk Soar →
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