---
id: CVE-2026-21833
title: >-
  HCL AION is affected by a vulnerability in which the Content-Security-Policy
  (CSP) HTTP response header is not configured
summary: >-
  HCL AION is affected by a vulnerability in which the Content-Security-Policy
  (CSP) HTTP response header is not configured. CSP helps prevent attacks such
  as Cross-Site Scripting (XSS) by restricting the sources from which scripts,
  styles…
severity: low
cvss: 3.7
cvssVector: 'CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:N/A:N'
cwe:
  - CWE-1032
vendor: HCL Software
product: AION
affected:
  - AION Version 2.5.0
published: '2026-10-01'
updated: '2026-10-02'
sourceUpdated: '2026-10-02T18:47:49.947'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-21833'
references:
  - url: >-
      https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0134082
    label: psirt@hcl.com
tags:
  - nvd
  - cve.org
epss: 0.00205
epssPercentile: 0.10346
ssvc:
  exploitation: none
  automatable: 'no'
  technicalImpact: partial
  timestamp: '2026-10-01T18:03:22.825890Z'
ingestedAt: '2026-10-01T18:55:42.361Z'
---

## Overview

HCL AION is affected by a vulnerability in which the Content-Security-Policy (CSP) HTTP response header is not configured. CSP helps prevent attacks such as Cross-Site Scripting (XSS) by restricting the sources from which scripts, styles, and other resources can be loaded. The absence of this header may reduce the effectiveness of browser-based security controls, potentially resulting in unintended behavior or negative security impacts under certain conditions.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.