Vulnerability in Hcl Software Aion
CVE-2026-21834
HCL AION is affected by a vulnerability where the Content-Security-Policy (CSP) security response header was missing from application responses. Without this header, the browser does not restrict the sources of scripts and other content, increasing exposure to cross-site scripting and content-injection attacks, potentially resulting in unintended behavior or security impact under certain conditions.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 3.1 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:L/I:N/A:N.
EPSS exploit prediction
EPSS: 0.002 (4.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 4th percentile — 4.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
The 30-day trend appears once there are two daily scores.
Affected products
- Hcl Software Aion — versions Version 2.7.0
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-21834?
- CVE-2026-21834 is a low-severity vulnerability in Hcl Software Aion, classified under Improper Restriction of Rendered UI Layers or Frames (Clickjacking). CVSS score: 3.1/10. Published 2026-11-06.
- How severe is CVE-2026-21834?
- Low severity. CVSS v3 base score is 3.1 out of 10.