🚨 CVE-2026-84115
A vulnerability was found in Cleo Harmony up to 5.8.1.10. The affected element is an unknown function of the file /api/connections of the component JWT Refresh Token Handler. Performing a manipulation of the argument Bearer results in improper privilege management. The attack is possible to be carried out remotely. The exploit has been made public and could be used. Upgrading to version 5.8.1.11 is sufficient to fix this issue. It is recommended to upgrade the affected component.
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Cleo
Cleo Harmony® 5.8.1 Release Notes
Important:Cleo product patches often contain security-strengthening capability enhancements and updates. We strongly recommend that customers remain on the latest product version and apply updates ...
September 1, 2026 15
