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CVE-2026-21826— HCL Digital Experience and HCL Digital Experience Compose could be susceptible to Host header injection

Quick assessment

Affected
HCLSoftware Digital Experience & DX Compose
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.

HCL Digital Experience和HCL Digital Experience Compose都是印度HCL公司的产品。HCL Digital Experience是一套数字体验平台，内容交付解决方案。HCL Digital Experience Compose是一个企业级内容创作与数字体验管理平台。 HCL Digital Experience和HCL Digital Experience Compose存在安全漏洞，该漏洞源于容易受到主机标头注入攻击，可能导致攻击者操纵主机标头使应用程序出

CVSS 6.1 · Medium EPSS 0.14% · P3

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
HCLSoftware Digital Experience & DX Compose 9.5 affected
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I. Basic Information for CVE-2026-21826

Vulnerability Information
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Vulnerability Title
HCL Digital Experience and HCL Digital Experience Compose could be susceptible to Host header injection
Source: CVE Program / CVE List V5
Vulnerability Description
HCL Digital Experience and HCL Digital Experience Compose could be susceptible to Host header injection.  An attacker can manipulate the Host header and cause the application to behave in unexpected ways.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
指向未可信站点的URL重定向(开放重定向)
Source: CVE Program / CVE List V5
Vulnerability Title
HCL Digital Experience和HCL Digital Experience Compose 安全漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
HCL Digital Experience和HCL Digital Experience Compose都是印度HCL公司的产品。HCL Digital Experience是一套数字体验平台，内容交付解决方案。HCL Digital Experience Compose是一个企业级内容创作与数字体验管理平台。 HCL Digital Experience和HCL Digital Experience Compose存在安全漏洞，该漏洞源于容易受到主机标头注入攻击，可能导致攻击者操纵主机标头使应用程序出
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
HCLSoftware Digital Experience & DX Compose 9.5 -

II. Public POCs for CVE-2026-21826

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III. Intelligence Information for CVE-2026-21826

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Vendor Advisories for CVE-2026-21826 (1)

Same Patch Batch · HCLSoftware · 2026-06-05 · 3 CVEs total

CVE-2026-21825 6.1 MEDIUM HCL Digital Experience Compose is affected by a reflected cross-site scripting (XSS) vulne
CVE-2026-21837 HCL Digital Experience is affected by an OS command injection vulnerability in the Digital

IV. Related Vulnerabilities

Same vendor: HCLSoftware
Same weakness: CWE-601

V. Comments for CVE-2026-21826

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