Splunk AI Toolkit <6.0.0: Upload Race Overwrite Attack
CVE-2026-76393 Published on August 19, 2026
Race Condition during Model Upload through the REST API in Splunk AI Toolkit
In Splunk AI Toolkit versions below 6.0.0, a user who can upload models could overwrite a model being uploaded by another user by sending a concurrent upload request for the same model name, causing the resulting model lookup entry to reference attacker-controlled content. The race condition is possible because Splunk AI Toolkit does not verify that the uploaded content belongs to the request that creates the model lookup entry. For more information see Troubleshoot the Splunk Machine Learning Toolkit (https://help.splunk.com/en/splunk-cloud-platform/apply-machine-learning/machine-learning-toolkit-user-guide/5.5.0/troubleshooting-mltk/troubleshoot-the-splunk-machine-learning-toolkit) in the Splunk documentation.
Weakness Type
What is a Race Condition Vulnerability?
The program contains a code sequence that can run concurrently with other code, and the code sequence requires temporary, exclusive access to a shared resource, but a timing window exists in which the shared resource can be modified by another code sequence that is operating concurrently.
CVE-2026-76393 has been classified to as a Race Condition vulnerability or weakness.
Products Associated with CVE-2026-76393
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Affected Versions
Splunk AI Toolkit:- Version 5.7 and below 6.0.0 is affected.