# CVE-2026-76398: Splunk AI Toolkit improper access control in experiment history deletion

Source: https://junglewise.ai/threats/cve-2026-76398-splunk-ai-toolkit-improper-access-control-in-experiment-history  
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-2026-76398 · Severity: medium · CVSS 4.3 · Published 2026-08-19

Splunk AI Toolkit is an extension that enables users to build and manage machine learning experiments within Splunk. A flaw in the REST API allows unprivileged users to delete experiment history records belonging to other users without authorization. This could lead to loss of audit trails, disruption of ML workflows, and unauthorized data destruction.

Technologies: [Splunk AI Toolkit](https://junglewise.ai/threats/technologies/ai-toolkit). Vendors: [Splunk](https://junglewise.ai/threats/vendors/splunk).

## Quick answers

**Is CVE-2026-76398 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-76398 being exploited in the wild.

**How severe is CVE-2026-76398?** Medium severity, with a CVSS score of 4.3, published 19 August 2026.

**Which products and versions are affected?** Splunk AI Toolkit 6.0 below 6.0.1, 5.7 below 6.0.0.

**Is there a fix for CVE-2026-76398?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-76398 attacked?** It is attacked over the network, in a hosted service.

**Am I affected by CVE-2026-76398?** Check whether you run Splunk AI Toolkit 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

The vulnerability is a missing authorization check (CWE-862) in the experiment history deletion endpoint of Splunk AI Toolkit's REST API. The root cause is that the application deletes experiment history before verifying the requesting user holds the required "admin" or "power" roles. An authenticated user without these roles can invoke the DELETE operation on another user's experiment history through a direct REST API call, achieving unauthorized data destruction. The vulnerability is fixed in versions 6.0.1 (for 6.0 branch) and 6.0.0 (for 5.7 branch).

## Affected products

- Splunk AI Toolkit 6.0 below 6.0.1, 5.7 below 6.0.0

## Timeline

- 2026-08-19: disclosed
- 2026-08-19: advisory: Splunk advisory SVD-2026-0808

## References

- [https://advisory.splunk.com/advisories/SVD-2026-0808](https://advisory.splunk.com/advisories/SVD-2026-0808)

## Related threats

- [Splunk AI Toolkit incorrect permission assignment for scheduled searches](https://junglewise.ai/threats/cve-2026-76399-splunk-ai-toolkit-incorrect-permission-assignment-for-scheduled)
- [Splunk AI Toolkit improper access control in experiment history](https://junglewise.ai/threats/cve-2026-76397-splunk-ai-toolkit-improper-access-control-in-experiment-history)
- [Splunk AI Toolkit improper access control in scheduled searches](https://junglewise.ai/threats/cve-2026-76396-splunk-ai-toolkit-improper-access-control-in-scheduled-searches)
- [Splunk AI Toolkit RCE through unsafe model deserialization](https://junglewise.ai/threats/cve-2026-76395-splunk-ai-toolkit-rce-through-unsafe-model-deserialization)
- [Splunk AI Toolkit missing authorization in REST API container management](https://junglewise.ai/threats/cve-2026-76394-splunk-ai-toolkit-missing-authorization-in-rest-api-container)