Improper Permissions in hMailServer by Progressive Robot
CVE-2026-107573

7.8HIGH

Key Information:

Vendor

Progressive Robot Ltd

Status
Hmailserver
Vendor
CVE Published:
8 October 2026

What is CVE-2026-107573?

The hMailServer installer creates data, log, temp, database, and event folders with overly permissive default settings, allowing local authenticated users to gain unauthorized read access to sensitive server data. This includes stored emails, logs, and the configuration file, potentially exposing account passwords and database access credentials. The Linux AppImage also shares similar permission issues, enabling local users to access individual data folders, further jeopardizing data security.

Affected Version(s)

hMailServer 6.0.0 < 6.3.6

References

https://gitlab.com/hmailserver/hmailserver/-/work_items/77
https://gitlab.com/hmailserver/hmailserver/-/releases/v6.3.6

CVSS V3.1

Score:
7.8
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Local
Attack Complexity:
Low
Privileges Required:
Low
User Interaction:
None
Scope:
Unchanged

Timeline

  • Vulnerability published

  • Vulnerability Reserved

Credit

Found in the hMailServer project's own security review (Progressive Robot Ltd)
.