CVE-2026-35112

HCL AION weakens browser isolation for embedded resources

HCL Software · HCL AION

First documented disclosure · Review checkpoint

Summary

Missing embedder policy weakens cross-origin isolation. A resource can be embedded without the intended opt-in, weakening browser isolation.

Severity and exploitation evidence

Medium · 4.2/10 · CVSS 3.1. Severity source.

Exploitation not established: The reviewed public sources describe the vulnerability and its conditions. Malicious exploitation has not been established in the reviewed sources.

Exploitation evidence source

Technical severity is not a measure of observed attacks or of risk to your deployment. Attempts, demonstrations, and successful compromise retain the qualifications in the source.

How the weakness works

The cross-origin embedder policy is missing or insufficient.

Conditions required

The affected page must embed content across origins.

Potential impact

A resource can be embedded without the intended opt-in, weakening browser isolation.

Affected versions and configurations

2.6.0.

Fix and mitigation status

2.8.0.

Practical next steps

Upgrade HCL AION to 2.8.0 and verify the affected control in the deployed interface.

Operating lesson

Set and test an embedder policy for cross-origin content.

Evidence and limits

HCL bulletin KB0135118 was published 2026-11-04 and identifies 2.8.0 as the fix. HCL’s CVE record gives 2026-11-03 as its public date.

Sources