CVE-2026-84115
High
Description
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.
SeverityHigh
CVSS8.3
Exploit probability41. percentile0.5%
ProductCleo Harmony
PublishedSep 1, 2026
First seenSep 1, 2026
Weakness typeCWE-269Improper privilege managementCWE-266CWE-266
How to fix
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| cleo harmony | 5.8.1.0, 5.8.1.1, 5.8.1.2, 5.8.1.3, 5.8.1.4, 5.8.1.5, 5.8.1.6, 5.8.1.7, 5.8.1.8, 5.8.1.9, 5.8.1.10 | — |
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