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CVE-2026-85021— langgenius dify Splash Layout splash.tsx router.replace cross site scripting

Quick assessment

Affected
langgenius dify
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.

LangGenius dify是LangGenius公司开源的一个LLM应用程序开发平台。 LangGenius dify 1.13.0版本存在安全漏洞，该漏洞源于对文件web/app/(shareLayout)/components/splash.tsx中router.replace函数的redirect_url参数操作不当，可能导致跨站脚本攻击。

CVSS 4.3 · Medium EPSS 0.50% · P43

Possible ATT&CK Techniques 1 AI

T1189.001

Affected Version Matrix 1

VendorProduct Version RangeStatus
langgenius dify 1.13.0 affected
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I. Basic Information for CVE-2026-85021

Vulnerability Information
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Vulnerability Title
langgenius dify Splash Layout splash.tsx router.replace cross site scripting
Source: CVE Program / CVE List V5
Vulnerability Description
A vulnerability was determined in langgenius dify 1.13.0. Affected is the function router.replace of the file web/app/(shareLayout)/components/splash.tsx of the component Splash Layout. This manipulation of the argument redirect_url causes cross site scripting. The attack is possible to be carried out remotely. The exploit has been publicly disclosed and may be utilized. The vendor was contacted early about this disclosure but did not respond in any way.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
在Web页面生成时对输入的转义处理不恰当(跨站脚本)
Source: CVE Program / CVE List V5
Vulnerability Title
LangGenius dify 跨站脚本漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
LangGenius dify是LangGenius公司开源的一个LLM应用程序开发平台。 LangGenius dify 1.13.0版本存在安全漏洞，该漏洞源于对文件web/app/(shareLayout)/components/splash.tsx中router.replace函数的redirect_url参数操作不当，可能导致跨站脚本攻击。
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
langgenius dify 1.13.0 cpe:2.3:a:langgenius:dify:*:*:*:*:*:*:*:*

II. Public POCs for CVE-2026-85021

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III. Intelligence Information for CVE-2026-85021

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Vendor Advisories for CVE-2026-85021 (3)

Proof of Concept for CVE-2026-85021 (1)

Other References for CVE-2026-85021 (3)

IV. Related Vulnerabilities

Same product: dify
Same vendor: langgenius
Same weakness: CWE-79