What’s Vulnerable › Vulnerabilities

CVE-2026-84114: Cleo Harmony SAML Authentication LocalUserUtil.getNativeUserByAssertions improper authentication

• Severity: medium (CVSS 6.3 v3.1)
• Exploited in the wild: not listed in CISA KEV
• EPSS: 0.5% probability of exploitation in the next 30 days
• Public exploit or detection template: none known
• Published: 2026-09-01 · updated 2026-09-01
• Weakness: CWE-287

Description

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.

Affected products

• 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)

References

• https://support.cleo.com/hc/en-us/articles/30258468834583-Cleo-Harmony-5-8-1-Release-Notes#Version58111
• https://vuldb.com/cve/CVE-2026-84114
• https://vuldb.com/submit/882467
• https://vuldb.com/vuln/397557
• https://vuldb.com/vuln/397557/cti

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