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CVE-2026-76356— Authentication Bypass through IP Address Spoofing in the Automation Broker in Splunk SOAR

Quick assessment

Affected
Splunk Splunk SOAR
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Splunk SOAR是美国Splunk公司的一个安全编排、自动化与响应的安全软件产品。 Splunk SOAR 8.6.0之前版本存在授权问题漏洞，该漏洞源于Automation Broker信任客户端提供的源IP地址标头，可能导致未经身份验证的用户通过特制请求伪造源IP地址并执行任意代码，进而造成数据泄露、影响系统完整性并破坏服务可用性。

CVSS 8.1 · High EPSS 0.61% · P48

Affected Version Matrix 1

VendorProduct Version RangeStatus
Splunk Splunk SOAR 8.6< 8.6.0 affected
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I. Basic Information for CVE-2026-76356

Vulnerability Information
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Vulnerability Title
Authentication Bypass through IP Address Spoofing in the Automation Broker in Splunk SOAR
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Splunk SOAR 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Splunk SOAR是美国Splunk公司的一个安全编排、自动化与响应的安全软件产品。 Splunk SOAR 8.6.0之前版本存在授权问题漏洞，该漏洞源于Automation Broker信任客户端提供的源IP地址标头，可能导致未经身份验证的用户通过特制请求伪造源IP地址并执行任意代码，进而造成数据泄露、影响系统完整性并破坏服务可用性。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Splunk Splunk SOAR 8.6 ~ 8.6.0 -

II. Public POCs for CVE-2026-76356

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III. Intelligence Information for CVE-2026-76356

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Vendor Advisories for CVE-2026-76356 (1)

Same Patch Batch · Splunk · 2026-08-19 · 110 CVEs total

CVE-2026-76312 9.4 CRITICAL Improper Access Control through Embedded Reports in Splunk Enterprise
CVE-2026-76310 9.4 CRITICAL Improper Access Control through Embedded Report REST API Requests in Splunk Enterprise
CVE-2026-76311 9.4 CRITICAL Improper Access Control in Embedded Report Dispatch Archives in Splunk Enterprise
CVE-2026-76404 9.1 CRITICAL Remote Code Execution (RCE) through Deserialization of Untrusted Data in Splunk MCP Server
CVE-2026-76319 8.8 HIGH Remote Code Execution (RCE) through Federated Search in Splunk Enterprise
CVE-2026-76316 8.8 HIGH Stored SPL Injection through Deployment Server Broker Registration in Splunk Enterprise
CVE-2026-76351 8.8 HIGH Server-Side Request Forgery (SSRF) through the Report Notification REST API in Splunk Secu
CVE-2026-76350 8.8 HIGH Improper Privilege Management through PDF Attachments for Email Alert Actions in Splunk En
CVE-2026-76389 8.8 HIGH Server-Side Request Forgery (SSRF) through the REST API in Cisco Talos Intelligence for En
CVE-2026-76253 8.8 HIGH Privilege Escalation through Scheduled Search Alert Action Configuration in Splunk Enterpr
CVE-2026-76315 8.8 HIGH Code Injection through Splunk Web Manager Configuration in Splunk Enterprise
CVE-2026-76395 8.8 HIGH Remote Code Execution (RCE) through Deserialization of Untrusted Data in the Model Loading
CVE-2026-76313 8.8 HIGH Remote Code Execution (RCE) through the REST API in Splunk Enterprise
CVE-2026-76335 8.8 HIGH Remote Code Execution (RCE) through Splunk Web Manager Configuration in Splunk Enterprise
CVE-2026-76352 8.8 HIGH Improper Authorization through the REST API in Splunk Enterprise
CVE-2026-76317 8.8 HIGH Path Traversal through the Lookup Configuration REST API in Splunk Enterprise
CVE-2026-76314 8.8 HIGH Remote Code Execution (RCE) through Splunk Web Manager Configuration in Splunk Enterprise
CVE-2026-76259 8.8 HIGH Improper Privilege Management on the Management Port in Splunk Enterprise for Windows
CVE-2026-76391 8.3 HIGH Improper Privilege Management through Agent Run History in Splunk AI Toolkit
CVE-2026-76394 8.3 HIGH Missing Authorization in Container and Connection Management through the REST API in Splun

Showing top 20 of 110 CVEs. View all on vendor page &rarr; →

IV. Related Vulnerabilities

Same product: Splunk SOAR
Same vendor: Splunk
Same weakness: CWE-290

V. Comments for CVE-2026-76356

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