# CVE-2026-76366: Splunk SOAR REST API session token disclosure

Source: https://junglewise.ai/threats/cve-2026-76366-splunk-soar-rest-api-session-token-disclosure  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-08-19. Updated: 2026-09-25  
License: CC BY 4.0 with a link back

CVE-2026-76366 · Severity: medium · CVSS 6.5 · Published 2026-08-19

Splunk SOAR is a security orchestration automation and response platform used to automate security workflows. A flaw in versions below 8.6.0 allows authenticated users to recover session tokens through REST API filtering, compromising access to all data visible to that user. An attacker with valid credentials could use this to escalate privileges or expose sensitive security data.

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

## Quick answers

**Is CVE-2026-76366 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76366 being exploited in the wild.

**How severe is CVE-2026-76366?** Medium severity, with a CVSS score of 6.5, published 19 August 2026.

**Which products and versions are affected?** Splunk SOAR below 8.6.0.

**Is there a fix for CVE-2026-76366?** A patch was published on 2026-08-19: Fixed in version 8.6.0 Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-76366 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-76366?** 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.

## Technical details

CVE-2026-76366 is an information disclosure vulnerability (CWE-200) in Splunk SOAR's REST API run-playbook endpoints. An authenticated user with a valid account can exploit improper REST API filtering to bypass response masking and extract session tokens that are normally hidden. The vulnerability requires a valid Splunk SOAR account and network access to the REST API; no additional privileges or special roles are needed. Successful exploitation allows an attacker to obtain session tokens that grant access to all data and functionality available to the compromised user. Splunk released a patch in version 8.6.0 addressing this issue.

## Affected products

- Splunk SOAR below 8.6.0

## Timeline

- 2026-08-19: disclosed
- 2026-08-19: patched: Fixed in version 8.6.0

## References

- [https://advisory.splunk.com/advisories/SVD-2026-0804](https://advisory.splunk.com/advisories/SVD-2026-0804)

## 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)