Goal Reached Thanks to every supporter — we hit 100%!

Goal: 1000 CNY · Raised: 1359 CNY

100%
Buy Us a Coffee

CVE-2026-114731

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 1.6.20 之前版本以及 1.7.x 系列中 1.7.5 之前的版本，受其 CSS 代理（utils/modcss 操作）中不受控资源消耗漏洞的影响。该漏洞导致获取的样式表会被完整读入内存，且未设置任何大小限制或读取超时机制。因此，若样式表 URL 指向攻击者控制的服务器，攻击者可借此耗尽服务器内存。上游已在提交“为 CSS 代理内容处理添加大小限制”中修复此问题，该修复将响应内容限制为 5 MB，采用流式读取方式，并设置了读取超时机制。

CVSS 5.3 · Medium

Possible ATT&CK Techniques 1 AI

T1499.003 · Application Exhaustion Flood
Get alerts for future matching vulnerabilities Log in to subscribe

I. Basic Information for CVE-2026-114731

Vulnerability Information
Have questions about the vulnerability? See if Shenlong's analysis helps!
View Shenlong Deep Dive ↗

Although we use advanced large model technology, its output may still contain inaccurate or outdated information.Shenlong tries to ensure data accuracy, but please verify and judge based on the actual situation.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 before 1.6.20 and 1.7.x before 1.7.5 is affected by an uncontrolled resource consumption vulnerability in the CSS proxy (the utils/modcss action). The fetched stylesheet was read into memory in full, with no size limit and no read timeout, so a stylesheet URL referencing an attacker-controlled host could be used to exhaust server memory. Upstream fixed this in the commit “Add a size limit to the CSS proxy content processing”, which caps the response at 5 MB, reads it as a stream and applies a read timeout.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L
Source: CVE Program / CVE List V5
Vulnerability Type
不加限制或调节的资源分配
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
Roundcube Webmail 1.6.0 ~ 1.6.20 -

II. Public POCs for CVE-2026-114731

# POC Description Source Link Shenlong Link
AI-Generated POC Premium

No public POC found.

Login to generate AI POC

III. Intelligence Information for CVE-2026-114731

请登录查看更多情报信息。

Vendor Advisories for CVE-2026-114731 (2)

Vendor Pages for CVE-2026-114731 (2)

Other References for CVE-2026-114731 (1)

Same Patch Batch · Roundcube · 2026-10-22 · 19 CVEs total

CVE-2026-114716 8.5 HIGH Roundcube 1.6.x/1.7.x 邮件头注入漏洞
CVE-2026-114727 8.3 HIGH Roundcube 1.6.20/1.7.5 前版本 ImageMagick 远程代码执行
CVE-2026-114724 7.4 HIGH Roundcube 1.6.20/1.7.5 前存在对象注入漏洞
CVE-2026-114730 7.2 HIGH Roundcube 1.6/1.7 SSRF 过滤器绕过漏洞
CVE-2026-114720 7.1 HIGH Roundcube 1.6.20/1.7.5 前 IMAP 命令注入漏洞
CVE-2026-114732 6.8 MEDIUM Roundcube 1.6.20/1.7.5 多主机认证绕过漏洞
CVE-2026-114715 6.8 MEDIUM Roundcube 1.6.20/1.7.5 前 Modoboa 驱动越权漏洞
CVE-2026-114722 6.5 MEDIUM Roundcube 1.6.20/1.7.5 前 CSS 作用域绕过漏洞
CVE-2026-114726 5.8 MEDIUM Roundcube 1.6.20/1.7.5 前邮件头注入漏洞
CVE-2026-114729 5.3 MEDIUM Roundcube 1.6.20/1.7.5前版本远程内容拦截绕过漏洞
CVE-2026-114714 5.3 MEDIUM Roundcube 1.6.20/1.7.5 插件路径遍历漏洞
CVE-2026-114728 5.3 MEDIUM Roundcube 1.6.20/1.7.5 远程内容拦截绕过漏洞
CVE-2026-114725 5.0 MEDIUM Roundcube 1.6.20/1.7.5 邮件头注入漏洞
CVE-2026-114718 4.7 MEDIUM Roundcube 1.6.20/1.7.5 前密码插件跨站脚本漏洞
CVE-2026-114717 4.0 MEDIUM Roundcube 1.6.20/1.7.5 邮件头注入漏洞
CVE-2026-114723 3.7 LOW Roundcube 1.6.20/1.7.5 缩略图生成资源限制绕过漏洞
CVE-2026-114719 3.7 LOW Roundcube 1.6.20/1.7.5 markasjunk 插件 CSRF 绕过漏洞
CVE-2026-114721 3.1 LOW Roundcube 1.6.20/1.7.5 配置绕过漏洞

IV. Related Vulnerabilities

Same product: Webmail
Same vendor: Roundcube
Same weakness: CWE-770

V. Comments for CVE-2026-114731

No comments yet

Leave a comment