Auth bypass in Cleo Harmony
CVE-2026-84114
A vulnerability has been found in Cleo Harmony up to 5.8.1.10. Impacted is the function LocalUserUtil.getNativeUserByAssertions of the component SAML Authentication. Such manipulation of the argument Email leads to improper authentication. The attack can be executed remotely. The exploit has been disclosed to the public and may be used. Upgrading to version 5.8.1.11 is recommended to address this issue. Upgrading the affected component is recommended.
Vulnerability class: Broken Authentication
CVSS v3 metric
CVSS v3 base score 6.3 (Medium). Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L.
Affected products
- Cleo Harmony — versions 5.8.1.0, 5.8.1.1, 5.8.1.10
Weakness classification (CWE)
References
- cna@vuldb.com (technical-description, vdb-entry)
- cna@vuldb.com (signature, permissions-required)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (third-party-advisory)
- cna@vuldb.com (patch, broken-link)
Frequently asked questions
- What is CVE-2026-84114?
- CVE-2026-84114 is a medium-severity vulnerability in Cleo Harmony, classified under Improper Authentication. CVSS score: 6.3/10. Published 2026-09-01.
- How severe is CVE-2026-84114?
- Medium severity. CVSS v3 base score is 6.3 out of 10.