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CVE-2026-76406— Information Disclosure through REST API Authentication 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.

在 Splunk SOAR 8.7.0 之前的版本中，若未认证用户能够获取受影响 Splunk SOAR 实例中的加密凭证数据，则可通过向表示状态转移（REST）API 提交 Basic 认证信息，从而暴露并解密该加密凭证数据。 该漏洞产生的原因是：Splunk SOAR 在完成认证检查之前，会先对加密的 Basic 认证值进行解密。 利用此漏洞需要未认证用户已持有来自受影响 Splunk SOAR 实例的加密凭证数据。因此，未认证用户无法随意利用该漏洞。 更多信息请参阅 Splunk 文档中关于《Splunk S

CVSS 5.9 · Medium
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I. Basic Information for CVE-2026-76406

Vulnerability Information
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Vulnerability Title
Information Disclosure through REST API Authentication in Splunk SOAR
Source: CVE Program / CVE List V5
Vulnerability Description
In Splunk SOAR versions below 8.7.0, an unauthenticated user with access to encrypted credential data from an affected Splunk SOAR instance could submit Basic authentication data to the Representational State Transfer (REST) API to expose and decrypt that encrypted credential data. The vulnerability is possible because Splunk SOAR decrypts encrypted Basic authentication values before completing authentication checks. The attack requires the unauthenticated user to have encrypted credential data from an affected Splunk SOAR instance. The unauthenticated user should not be able to exploit the vulnerability at will. For more information see Using the REST API reference for Splunk SOAR (On-premises) (https://help.splunk.com/en/splunk-soar/soar-on-premises/rest-api-reference/8.5.0/using-the-splunk-soar-rest-api/using-the-rest-api-reference-for-splunk-soar-on-premises) 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:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
通过差异性导致的信息暴露
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Splunk Splunk SOAR 0 ~ 8.7.0 -

II. Public POCs for CVE-2026-76406

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III. Intelligence Information for CVE-2026-76406

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Vendor Pages for CVE-2026-76406 (1)

Same Patch Batch · Splunk · 2026-10-21 · 31 CVEs total

CVE-2026-76291 8.8 HIGH Improper Access Control through Scheduled Search Safeguards in Splunk Enterprise
CVE-2026-76298 8.8 HIGH Use of Hard-coded Cryptographic Key in the PostgreSQL Sidecar Service in Splunk Enterprise
CVE-2026-76306 7.5 HIGH Information Disclosure through REST API Query Filters in Splunk SOAR
CVE-2026-76290 7.5 HIGH Denial of Service (DoS) through Unauthenticated Package Downloads over the REST API in Spl
CVE-2026-76288 7.5 HIGH Denial of Service (DoS) through Splunk Web Content-Type Header Parsing in Splunk Enterpris
CVE-2026-76307 7.2 HIGH Sensitive Information Disclosure through REST API Query Filters in Splunk SOAR
CVE-2026-76293 7.2 HIGH Remote Code Execution (RCE) through Splunk Web Manager Extensible Markup Language (XML) in
CVE-2026-76308 6.5 MEDIUM Missing Authorization through the REST API in Splunk SOAR
CVE-2026-76305 6.5 MEDIUM Improper Access Control during App Downloads in Splunk SOAR
CVE-2026-76292 6.5 MEDIUM Missing Authorization through REST API Endpoints in Splunk Secure Gateway
CVE-2026-76289 6.5 MEDIUM Denial of Service (DoS) through the REST API in Splunk Enterprise
CVE-2026-76303 5.7 MEDIUM Stored Cross-Site Scripting (XSS) through App Documentation in Splunk SOAR
CVE-2026-76287 5.4 MEDIUM Authorization Bypass in the Data Management REST API in Splunk Enterprise
CVE-2026-76296 4.3 MEDIUM Missing Authorization through Sourcetype Renaming in Splunk Web for Splunk Enterprise
CVE-2026-76295 4.3 MEDIUM SPL Injection through the REST API in Splunk Secure Gateway
CVE-2026-76304 4.3 MEDIUM Sensitive Information Disclosure through Automation Broker Configuration in Splunk SOAR
CVE-2026-76294 4.3 MEDIUM Improper Access Control in Field Extraction Management in Splunk Enterprise
CVE-2026-76297 4.2 MEDIUM Federated Search Provider State Change through Cross-Site Request Forgery (CSRF) in Splunk
CVE-2026-76300 Security Hardening in Splunk Enterprise - October 2026
CVE-2026-76301 Security Hardening in Splunk Enterprise - October 2026

Showing top 20 of 31 CVEs. View all on vendor page → →

IV. Related Vulnerabilities

Same product: Splunk SOAR
Same vendor: Splunk
Same weakness: CWE-203

V. Comments for CVE-2026-76406

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