CVE-2026-66984

HCL AION discloses internal filesystem paths in responses

HCL Software · HCL AION

First documented disclosure · Review checkpoint

Summary

Responses reveal internal server paths. A recipient can learn internal directory structure.

Severity and exploitation evidence

Low · 3.1/10 · 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

Some application responses reveal server-side path information.

Conditions required

A user must encounter one of the affected responses. HCL does not enumerate all such responses.

Potential impact

A recipient can learn internal directory structure.

Affected versions and configurations

2.7.0.

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

Return general client error messages and keep diagnostic details in restricted logs.

Evidence and limits

HCL bulletin KB0135217 was published 2026-11-06 and identifies 2.8.0 as the fix.

Sources