CVE-2026-35113

HCL AION weakens browser isolation for opened documents

HCL Software · HCL AION

First documented disclosure · Review checkpoint

Summary

Missing opener policy weakens cross-origin isolation. Documents can share a browsing context that the application intended to isolate.

Severity and exploitation evidence

Medium · 4.8/10 · 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 opener policy is absent or insufficient.

Conditions required

An affected browsing context must interact with a document from another origin.

Potential impact

Documents can share a browsing context that the application intended to isolate.

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

Verify that opener policies isolate untrusted windows.

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