CVE-2026-114490 Incorrect Authorization in hMailServer
- Exploited in the wild
- Not known
- Fix
- None listed
What is CVE-2026-114490?
CVE-2026-114490 is a high-severity vulnerability in Progressive Robot Ltd hMailServer, published on 21 Oct 2026.
Official description
Incorrect authorization in the COM administration API of Progressive Robot hMailServer 6.3.4 through 6.3.6 allows an account assigned the serveradmin role with a list of domains - a credential an administrator may create meaning to confine it to those domains - to act as the whole-server administrator over COM. Administrator roles are meant to confine such a credential to the domains its list names, and the REST API did not take it for the server administrator, but the COM API's server-administrator check read the administer_server permission as the whole server whatever list the grant carried. So the credential signed in through the Control Panel, or through a script run on the server, as the server administrator of every domain: it could read and change every domain's accounts and mail, rename any domain, map a domain alias onto any, write the server's settings and secrets, and create further server-administrator accounts. The COM API's domain-administrator check, asked with no domain, likewise let an account assigned the domainadmin role with a list of domains that leaves out the account's own domain administer that domain's ordinary accounts over COM. An account holding serveradmin with no list is the server administrator by design and is unaffected, as are the help desk, auditor and custom roles.
Weakness: CWE-863
Which versions are affected by CVE-2026-114490?
How do I fix CVE-2026-114490?
No fix has been published for CVE-2026-114490 yet. Limit exposure of the affected software until one is available.
Is CVE-2026-114490 being exploited?
There is no known exploitation of CVE-2026-114490 in the wild and no public exploit code.
Sources
Also known as GHSA-x628-2rx4-74pm.