---
title: "CVE-2026-114490: Progressive Robot hMailServer - Broken Access Control"
description: "Progressive Robot hMailServer 6.3.4 through 6.3.6 contains an authorization bypass caused by improper permission checks in the COM administration API, letting accounts with serveradmin role act as whole-server administrators, exploit requires serveradmin role with domain list."
url: https://panop.io/threat-heartbeat/CVE-2026-114490/
---

# CVE-2026-114490 Progressive Robot hMailServer - Broken Access Control

Progressive Robot hMailServer 6.3.4 through 6.3.6 contains an authorization bypass caused by improper permission checks in the COM administration API, letting accounts with serveradmin role act as whole-server administrators, exploit requires serveradmin role with domain list.

CVSS base score 7.8 /10

High

CISA KEV

Not listed

Public exploit

None known

Authentication

Required

[View the NVD record ↗](https://nvd.nist.gov/vuln/detail/CVE-2026-114490)

## Details

Type

Broken Access Control

Impact

Privilege Escalation, Data Tampering, Information Disclosure

CVSS vector

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

Published

21 October 2026

Updated

22 October 2026

Weakness

[CWE-863](https://cwe.mitre.org/data/definitions/863.html)

## Vendor fix

Update to a version later than 6.3.6 or apply vendor patches addressing authorization checks.

Patching closes this CVE. It does not tell you which of your systems run the affected version, or what else is exposed alongside them.

## References

- [https://nvd.nist.gov/vuln/detail/CVE-2026-114490](https://nvd.nist.gov/vuln/detail/CVE-2026-114490)
- [https://gitlab.com/hmailserver/hmailserver/-/releases/v6.3.7](https://gitlab.com/hmailserver/hmailserver/-/releases/v6.3.7)
- [https://gitlab.com/hmailserver/hmailserver/-/work\_items/87](https://gitlab.com/hmailserver/hmailserver/-/work_items/87)

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## What this record can't tell you

- Whether you run the affected software, and where
- Whether an attacker can actually reach and exploit it
- The misconfigurations that never get a CVE number
- What it would cost the business, ranked into what to fix first

Panop answers these inside your environment, for this CVE and every other finding.

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