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CVE-2026-114477— Missing 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 6.2.25 至 6.3.6 版本中，REST 指标（metrics）路由缺少授权检查，导致受限在特定命名域内的远程认证用户可以读取整个服务器的流量历史记录。GET /api/v1/metrics/history 接口返回过去 30 天内服务器的流量计数器；这些计数器为全局统计且不关联任何特定域，因此报告（report）路由已明确拒绝向仅拥有命名域权限的凭证提供此类数据。然而，指标路由未被纳入服务器的授权拦截逻辑，且其处理函数未接收调用者上下文，导致以下角

CVSS 4.3 · Medium

Possible ATT&CK Techniques 1 AI

T1087 · Account Discovery

Affected Version Matrix 1

VendorProduct Version RangeStatus
Progressive Robot Ltd hMailServer 6.2.25≤ 6.3.6 affected
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I. Basic Information for CVE-2026-114477

Vulnerability Information
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Vulnerability Title
Missing Authorization in hMailServer
Source: CVE Program / CVE List V5
Vulnerability Description
Missing authorization in the REST metrics route of Progressive Robot hMailServer 6.2.25 through 6.3.6 allows a remote authenticated user whose credential is confined to named domains to read the server-wide traffic history. GET /api/v1/metrics/history returns the server's traffic counters over the last 30 days; those counters are server-wide and carry no domain, which is why the report routes already refuse the same counters to a credential confined to named domains. The metrics route was not among the routes the server's authorization gate refuses a confined credential and its handler was not given the caller, so a domain administrator, an account given another role that holds view_configuration in named domains (the auditor role given a domain list among them), or an API key issued for named domains could read the whole server's traffic totals rather than its own domains'. The disclosure is of aggregate operational counters, not of any message or account.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
授权机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Progressive Robot Ltd hMailServer 6.2.25 ~ 6.3.6 -

II. Public POCs for CVE-2026-114477

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III. Intelligence Information for CVE-2026-114477

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Vendor Pages for CVE-2026-114477 (1)

Other References for CVE-2026-114477 (1)

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

CVE-2026-114489 8.1 HIGH Missing Authorization in hMailServer
CVE-2026-114490 7.8 HIGH Incorrect 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-2026-114472 3.7 LOW Insufficient Resource Pool in hMailServer

IV. Related Vulnerabilities

Same product: hMailServer
Same vendor: Progressive Robot Ltd
Same weakness: CWE-862

V. Comments for CVE-2026-114477

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