# CVE-2026-76406: Splunk SOAR credential decryption via REST API authentication

Source: https://junglewise.ai/threats/cve-2026-76406-in-splunk-soar-versions-below-8-7-0-an-unauthenticated-user-with  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-21. Updated: 2026-10-21  
License: CC BY 4.0 with a link back

CVE-2026-76406 · Severity: medium · CVSS 5.9 · Published 2026-10-21

Splunk SOAR is a security automation platform used to orchestrate incident response workflows. In versions below 8.7.0, an unauthenticated attacker with access to encrypted credential data could submit specially crafted authentication requests to the REST API that cause the system to decrypt credentials before verifying the attacker's identity. This could expose sensitive stored credentials like database passwords or API keys.

Technologies: [Splunk SOAR](https://junglewise.ai/threats/technologies/soar). Vendors: [Splunk](https://junglewise.ai/threats/vendors/splunk).

## Quick answers

**Is CVE-2026-76406 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76406 being exploited in the wild.

**How severe is CVE-2026-76406?** Medium severity, with a CVSS score of 5.9, published 21 October 2026.

**Which products and versions are affected?** Splunk SOAR below 8.7.0.

**Is there a fix for CVE-2026-76406?** Yes: fixed in 8.7.0. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-76406 attacked?** It is attacked over the network.

**Am I affected by CVE-2026-76406?** Check whether you run Splunk SOAR at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## How to fix

- Fixed in 8.7.0

## Technical details

An information disclosure vulnerability in Splunk SOAR's REST API occurs because the system decrypts Basic authentication credentials before completing authentication validation. An unauthenticated attacker who possesses encrypted credential data from the target instance could exploit this logic flaw to decrypt that data. The vulnerability requires prior access to encrypted credentials and is not exploitable at will.

## Affected products

- Splunk SOAR below 8.7.0

## Timeline

- 2026-10-21: disclosed

## References

- [https://advisory.splunk.com/advisories/SVD-2026-1010](https://advisory.splunk.com/advisories/SVD-2026-1010)

## Related threats

- [Splunk SOAR files or directories accessible to external parties](https://junglewise.ai/threats/cve-2026-76531-as-part-of-cisco-s-ongoing-commitment-to-proactive-security-and)
- [Splunk SOAR authorization bypass via non-canonical URL paths](https://junglewise.ai/threats/cve-2026-76530-as-part-of-cisco-s-ongoing-commitment-to-proactive-security-and)
- [Splunk SOAR improper protection of alternate path](https://junglewise.ai/threats/cve-2026-76529-as-part-of-cisco-s-ongoing-commitment-to-proactive-security-and)
- [Splunk SOAR protection mechanism failure](https://junglewise.ai/threats/cve-2026-76528-as-part-of-cisco-s-ongoing-commitment-to-proactive-security-and)
- [Splunk SOAR improper handling of exceptional conditions](https://junglewise.ai/threats/cve-2026-76527-as-part-of-cisco-s-ongoing-commitment-to-proactive-security-and)