CVE-2026-84114 Cleo Harmony SAML Authentication LocalUserUtil.getNativeUserByAssertions improper authentication
Remote attackers can bypass SAML authentication in Cleo Harmony by manipulating email assertions, leading to unauthorized access.
- Exploited in the wild
- Not known
- Login needed
- Any signed-in user
- Attackable
- Over the internet
- Victim action needed
- Not needed
- Fix
- None listed
What is CVE-2026-84114?
CVE-2026-84114 is a medium-severity authentication bypass vulnerability in Cleo Harmony, published on 1 Sep 2026. Any signed-in user can exploit it over the network, with no action from the victim.
Official 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.
Weakness: CWE-287
Which versions are affected by CVE-2026-84114?
How do I fix CVE-2026-84114?
No fix has been published for CVE-2026-84114 yet. Limit exposure of the affected software until one is available.
Upgrade, and rotate credentials and sessions that may have been exposed. More about Authentication bypass.
Is CVE-2026-84114 being exploited?
There is no known exploitation of CVE-2026-84114 in the wild and no public exploit code.
Sources
Also known as GHSA-q66c-gqf3-vf5c.