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CVE-2026-62644

Quick assessment

Affected
Roundcube Webmail
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.

Roundcube webmail是Roundcube团队开源的一款Web邮件客户端软件。 Roundcube webmail 1.6.17之前版本和1.7.2之前版本存在授权问题漏洞，该漏洞源于密码插件通过会话数据进行用户名欺骗，可能导致账户接管。

CVSS 6.4 · Medium EPSS 0.50% · P41

Possible ATT&CK Techniques 1 AI

T1110.004 · Credential Stuffing

Affected Version Matrix 2

VendorProduct Version RangeStatus
Roundcube Webmail 1.6.0< 1.6.17 affected
1.7.0< 1.7.2 affected
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I. Basic Information for CVE-2026-62644

Vulnerability Information
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Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
In Roundcube Webmail before 1.6.17 and 1.7.x before 1.7.2, the password plugin of the Roundcube Webmail was subject to username spoofing via session data, which could lead to account takeover.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
使用欺骗进行的认证绕过
Source: CVE Program / CVE List V5
Vulnerability Title
Roundcube webmail 授权问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Roundcube webmail是Roundcube团队开源的一款Web邮件客户端软件。 Roundcube webmail 1.6.17之前版本和1.7.2之前版本存在授权问题漏洞，该漏洞源于密码插件通过会话数据进行用户名欺骗，可能导致账户接管。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)

Affected Products

Vendor Product Affected Versions CPE Subscribe
Roundcube Webmail 1.6.0 ~ 1.6.17 -

II. Public POCs for CVE-2026-62644

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III. Intelligence Information for CVE-2026-62644

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Patches & Fixes for CVE-2026-62644 (4)

Vendor Advisories for CVE-2026-62644 (1)

Vendor Pages for CVE-2026-62644 (2)

Same Patch Batch · Roundcube · 2026-07-14 · 6 CVEs total

CVE-2026-62643 7.2 HIGH Roundcube webmail 服务端请求伪造漏洞
CVE-2026-54433 7.2 HIGH Roundcube webmail 跨站脚本漏洞
CVE-2026-54432 4.7 MEDIUM Roundcube webmail 跨站脚本漏洞
CVE-2026-62642 4.3 MEDIUM Roundcube webmail 资源管理错误漏洞
CVE-2026-62641 4.3 MEDIUM Roundcube webmail 资源管理错误漏洞

IV. Related Vulnerabilities

Same product: Webmail
Same vendor: Roundcube
Same weakness: CWE-290

V. Comments for CVE-2026-62644

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