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CVE-2026-48843

Quick assessment

Affected
Roundcube Webmail
Exploitation
Public or AI PoC available; prioritize validation
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开源的一款基于浏览器的开源IMAP客户端，它支持地址薄管理、信息搜索、拼写检查等。 Roundcube Webmail 1.6.x 1.6.14至1.6.16版本和1.7.x 1.7.1之前版本存在代码问题漏洞，该漏洞源于HTML邮件中CSS清理不足，可能导致SSRF或信息泄露。

CVSS 7.2 · High EPSS 0.27% · P17

Affected Version Matrix 2

VendorProduct Version RangeStatus
Roundcube Webmail 1.6.14< 1.6.16 affected
1.7.0< 1.7.1 affected
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I. Basic Information for CVE-2026-48843

Vulnerability Information
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Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.

Vulnerability Title
N/A
Source: CVE Program / CVE List V5
Vulnerability Description
Roundcube Webmail 1.6.x between 1.6.14 and 1.6.16,and 1.7.x before 1.7.1 has Insufficient Cascading Style Sheets (CSS) sanitization in HTML e-mail messages may lead to SSRF or Information Disclosure, e.g., if stylesheet links point to local network hosts. The issue stems from an insufficient fix for CVE-2026-35540.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
服务端请求伪造(SSRF)
Source: CVE Program / CVE List V5
Vulnerability Title
Roundcube Webmail 代码问题漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Roundcube Webmail是Roundcube开源的一款基于浏览器的开源IMAP客户端，它支持地址薄管理、信息搜索、拼写检查等。 Roundcube Webmail 1.6.x 1.6.14至1.6.16版本和1.7.x 1.7.1之前版本存在代码问题漏洞，该漏洞源于HTML邮件中CSS清理不足，可能导致SSRF或信息泄露。
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 1.6.14 ~ 1.6.16 -

II. Public POCs for CVE-2026-48843

# POC Description Source Link Shenlong Link
AI-Generated POC Premium
Qwen3.6-35B-A3B · 8023 chars
Pro+ exclusive includes:
Vulnerability reproduction recording (real sandbox build + trigger, exclusive)
In-depth vulnerability mechanism
Trigger conditions & impact
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Exploit chain & mitigation
POC zip download
100+ AI POC generations per month

III. Intelligence Information for CVE-2026-48843

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Patches & Fixes for CVE-2026-48843 (2)

Vendor Advisories for CVE-2026-48843 (1)

Vendor Pages for CVE-2026-48843 (2)

Same Patch Batch · Roundcube · 2026-05-25 · 8 CVEs total

CVE-2026-48842 8.1 HIGH Roundcube Webmail SQL注入漏洞
CVE-2026-48844 7.5 HIGH Roundcube Webmail 安全漏洞
CVE-2026-48848 7.2 HIGH Roundcube Webmail 跨站脚本漏洞
CVE-2026-48846 6.5 MEDIUM Roundcube Webmail 安全漏洞
CVE-2026-48845 6.5 MEDIUM Roundcube Webmail 安全漏洞
CVE-2026-48849 4.4 MEDIUM Roundcube Webmail 跨站脚本漏洞
CVE-2026-48847 3.7 LOW Roundcube Webmail 安全漏洞

IV. Related Vulnerabilities

Same product: Webmail
Same vendor: Roundcube
Same weakness: CWE-918

V. Comments for CVE-2026-48843

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