CVE-2026-84115Cleo Harmony JWT Refresh Token connections privileges management
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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.
- CVSS
- 8.3 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L/E:P/RL:O/RC:C
- Weakness (CWE)
- CWE-269, CWE-266
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- VulDB
- NVD analysis
- Deferred
- Record last updated
- Sep 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Cleo Harmony 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; and 4 more ranges | CNA record |
References
- https://vuldb.com/vuln/397558vdb-entry, technical-description
- https://vuldb.com/vuln/397558/ctisignature, permissions-required
- https://vuldb.com/cve/CVE-2026-84115third-party-advisory
- https://vuldb.com/submit/882468third-party-advisory
- https://support.cleo.com/hc/en-us/articles/30258468834583-Cleo-Harmony-5-8-1-Release-Notes#Version58111broken-link, patch
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.