CVE-2026-85514: Stackstorm ST2

Medium severity, CVSS 6.3. EPSS: 0.4% chance of exploitation in the next 30 days.

A security vulnerability has been detected in StackStorm st2 up to 3.9.0. Impacted is an unknown function of the file st2api/st2api/controllers/v1/auth.py of the component API Key Handler. Such manipulation of the argument api_key_api.user leads to improper privilege management. The attack may be performed from remote. The exploit has been disclosed publicly and may be used. The project was informed of the problem early through an issue report but has not responded yet.

Affected products

• Stackstorm ST2: version 3.0 only; version 3.1 only; version 3.2 only; version 3.3 only; version 3.4 only; version 3.5 only; …

Published 2026-09-04. Last modified 2026-09-04.