Medium [CVE-2026-76406] Information Disclosure through REST API Authentication in Splunk SOAR
This medium-severity Splunk advisory covers CVE-2026-76406 affecting Splunk SOAR.
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Summary
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 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) ( ) in the Splunk documentation.
- Splunk SOAR before 8.7.0
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
Mitigation
Upgrade to a fixed release: 8.7.0. That is the remediation for this advisory.
The vendor advisory may list additional interim mitigations or workarounds not captured here — review it before change work.
Official advisory · high-confidence parse· fetched 7 hours ago·verify at source
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