CVE-2026-21826

Name: CVE-2026-21826
Creator: NVD / NIST
Published: 2026-06-05T07:16:29.883+00:00
License: https://creativecommons.org/publicdomain/zero/1.0/

MEDIUMCVSS 6.1/10EPSS 0.14%

Last modified Jun 17, 2026

CVE-2026-21826 is a medium-severity vulnerability rated 6.1/10 on the CVSS scale. 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.. EPSS estimates a 0.14% chance of exploitation in the next 30 days.

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.

Metrics

CVSS 3.1

6.1/10

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

EPSS Probability

0.14%

4.0th percentile

Probability of exploitation in the next 30 days. Learn more

Weakness Enumeration

CWE-601

Affected Software

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

References

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

Timeline

Published: Jun 5, 2026
Last Modified: Jun 17, 2026
Status: Analyzed

Frequently Asked Questions

What is CVE-2026-21826?

How severe is CVE-2026-21826?

CVE-2026-21826 has a CVSS score of 6.1/10 (MEDIUM severity). The EPSS model estimates a 0.14% probability of exploitation in the next 30 days.

How do I fix CVE-2026-21826?

Check the vendor references and advisories linked above for patched versions and mitigation guidance. You can also run a Strix scan to test if your systems are affected.

Are you affected by CVE-2026-21826?

Run a free Strix scan to check your systems for this vulnerability.

Scan your code now

Source: NVD / NIST