CVE-2026-114474— hMailServer 使用不可信来源漏洞
一分钟漏洞结论
影响对象
Progressive Robot Ltd hMailServer
利用判断
尚无明确在野利用证据，仍需结合暴露面评估
建议动作
优先检查厂商安全公告和参考链接中的修复版本；无法立即升级时，限制受影响服务暴露并加强监测。
在 Progressive Robot hMailServer 6.0.0 至 6.3.6 版本中，外部账户邮件下载功能使用了可信度较低的信封发件人来源，这使得远程未认证攻击者能够伪造由该服务器托管的域名的发件人身份，并让服务器以该域名为信封发件人发送邮件，从而在接收方处通过 SPF 和 DMARC 验证。 具体而言，从外部 POP3 或 IMAP 账户下载的邮件本身没有独立的 SMTP 信封，而该服务器会直接将其“发件人（From）”头部的地址用作信封发件人，无论该地址为何。当此类邮件被转发或重定向到外部地址时，
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一、 漏洞 CVE-2026-114474 基础信息
漏洞信息
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Vulnerability Title
Use of Less Trusted Source in hMailServer
来源: CVE Program / CVE List V5
Vulnerability Description
Use of a less trusted source for the envelope sender in the external-account download of Progressive Robot hMailServer 6.0.0 through 6.3.6 allows a remote unauthenticated attacker to have mail they write in the name of a domain the server hosts sent on by the server with an envelope sender at that domain, so that it passes the domain's SPF and DMARC at other receivers. A message the server downloads from an external POP3 or IMAP account has no SMTP envelope of its own, and the server took the address in its From header as its envelope sender, whatever that address was. A forward or redirect of the downloaded message to an outside address then left with that address as its envelope sender, which the Sender Rewriting Scheme leaves alone for a hosted domain, so that the receiver's SPF check passed for the forged domain, aligned even under strict alignment, with no non-default setting, host name record or DMARC policy needed. An attacker needs to know a mailbox elsewhere that an account here collects and forwards to an outside address; an account holder who adds an external account of their own can collect from a server of their own, which matters where SmtpAuthenticatedSenderCheck holds signed-in senders to their own addresses.
来源: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:H/A:N
来源: CVE Program / CVE List V5
Vulnerability Type
使用不可信的源
来源: CVE Program / CVE List V5
受影响产品
| 厂商 | 产品 | 影响版本 | CPE | 订阅 |
|---|---|---|---|---|
| Progressive Robot Ltd | hMailServer | 6.0.0 ~ 6.3.6 | - |
|
二、漏洞 CVE-2026-114474 的公开POC
| # | POC 描述 | 源链接 | 神龙链接 |
|---|
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CVE-2026-114474 厂商页面 (1)
CVE-2026-114474 其他参考 (1)
同批安全公告 · Progressive Robot Ltd · 2026-10-21 · 共 12 条
| CVE-2026-114489 | 8.1 HIGH | hMailServer 授权缺失漏洞 |
| CVE-2026-114490 | 7.8 HIGH | hMailServer 身份验证错误漏洞 |
| CVE-2026-114476 | 7.5 HIGH | hMailServer 身份验证错误漏洞 |
| CVE-2026-114475 | 6.5 MEDIUM | hMailServer 授权缺失漏洞 |
| CVE-2026-114478 | 5.9 MEDIUM | hMailServer 混淆代理漏洞 |
| CVE-2026-114479 | 5.8 MEDIUM | hMailServer 非安全失败（开放）漏洞 |
| CVE-2026-114470 | 5.3 MEDIUM | hMailServer 跨站请求伪造漏洞 |
| CVE-2026-114473 | 5.0 MEDIUM | hMailServer 身份验证绕过漏洞 |
| CVE-2026-114471 | 4.7 MEDIUM | hMailServer 敏感信息写入日志文件漏洞 |
| CVE-2026-114477 | 4.3 MEDIUM | hMailServer 未授权访问漏洞 |
| CVE-2026-114472 | 3.7 LOW | hMailServer 资源池不足漏洞 |
IV. Related Vulnerabilities
V. Comments for CVE-2026-114474
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