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CVE-2026-114490— Incorrect Authorization in hMailServer

Quick assessment

Affected
Progressive Robot Ltd hMailServer
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

Progressive Robot hMailServer 6.3.4 至 6.3.6 版本的 COM 管理 API 存在授权缺陷。若将服务器管理员（serveradmin）角色分配给某个账户，并为其指定一个域名列表（该列表本意是限制该账户仅能管理这些域名），该账户仍可通过 COM 接口获得整个服务器的管理员权限。服务器管理员角色的设计初衷是将此类凭证的作用范围限制在其所指定的域名列表内；REST API 确实遵循了这一限制，未将其视为全局服务器管理员，但 COM API 在检查服务器管理员权限时，错误地将"adm

CVSS 7.8 · High

Affected Version Matrix 1

VendorProduct Version RangeStatus
Progressive Robot Ltd hMailServer 6.3.4≤ 6.3.6 affected
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I. Basic Information for CVE-2026-114490

Vulnerability Information
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Vulnerability Title
Incorrect Authorization in hMailServer
Source: CVE Program / CVE List V5
Vulnerability 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.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:L/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制不正确
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Progressive Robot Ltd hMailServer 6.3.4 ~ 6.3.6 -

II. Public POCs for CVE-2026-114490

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III. Intelligence Information for CVE-2026-114490

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Vendor Pages for CVE-2026-114490 (1)

Other References for CVE-2026-114490 (1)

Same Patch Batch · Progressive Robot Ltd · 2026-10-21 · 12 CVEs total

CVE-2026-114489 8.1 HIGH Missing Authorization in hMailServer
CVE-2026-114476 7.5 HIGH Incorrect Authorization in hMailServer
CVE-2026-114475 6.5 MEDIUM Missing Authorization in hMailServer
CVE-2026-114478 5.9 MEDIUM Unintended Proxy or Intermediary ('Confused Deputy') in hMailServer
CVE-2026-114474 5.9 MEDIUM Use of Less Trusted Source in hMailServer
CVE-2026-114479 5.8 MEDIUM Not Failing Securely ('Failing Open') in hMailServer
CVE-2026-114470 5.3 MEDIUM Cross-Site Request Forgery (CSRF) in hMailServer
CVE-2026-114473 5.0 MEDIUM Incorrect Authorization in hMailServer
CVE-2026-114471 4.7 MEDIUM Insertion of Sensitive Information into Log File in hMailServer
CVE-2026-114477 4.3 MEDIUM Missing Authorization in hMailServer
CVE-2026-114472 3.7 LOW Insufficient Resource Pool in hMailServer

IV. Related Vulnerabilities

Same product: hMailServer
Same vendor: Progressive Robot Ltd
Same weakness: CWE-863

V. Comments for CVE-2026-114490

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