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

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.

CVSS vector

CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:L/A:L

Attack vector

Network

Complexity

Low

Privileges

Low

User interaction

None

Confidentiality

Low

Integrity

Low

Availability

Low

Scope

Unchanged

Exploitation

Is it being used?

Exploit prediction (EPSS)0.5% · higher than 40% of CVEs

Exploited in the wildNo evidence yet

CISA KEVNot listed

Ransomware campaign useNot known

Affected products

Which versions

HA

Harmony · Cleo

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 more · source: vendor