CVE-2026-21826 — MEDIUM (6.1)

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.

CVSS Score

6.1

MEDIUM

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N

Attack Vector

NETWORK

Attack Complexity

LOW

Privileges Required

NONE

User Interaction

REQUIRED

Scope

CHANGED

Confidentiality

LOW

Integrity

LOW

Availability

NONE

Affected Products

Vendor	Product	Versions
Hcltech	Digital Experience Compose	9.5
Hcltech	Digital Experience	9.5

Related Weaknesses (CWE)

CWE-601

References

https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0130849Vendor Advisory

FAQ

What is CVE-2026-21826?

CVE-2026-21826 is a vulnerability with a CVSS score of 6.1 (MEDIUM). 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 w...

How severe is CVE-2026-21826?

CVE-2026-21826 has been rated MEDIUM with a CVSS base score of 6.1/10. Review the CVSS metrics above for detailed severity breakdown.

Is there a patch for CVE-2026-21826?

Check the references section above for vendor advisories and patch information. Affected products include: Hcltech Digital Experience Compose, Hcltech Digital Experience.