# CVE-2026-35113: HCL AION missing Cross-Origin-Opener-Policy header

Source: https://junglewise.ai/threats/cve-2026-35113-hcl-aion-is-affected-by-a-vulnerability-where-the-cross-origin  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-11-06. Updated: 2026-11-06  
License: CC BY 4.0 with a link back

CVE-2026-35113 · Severity: medium · CVSS 4.8 · Published 2026-11-06

HCL AION is a business application that may be vulnerable to cross-window attacks if the Cross-Origin-Opener-Policy (COOP) header is missing or misconfigured. An attacker could potentially manipulate interactions between windows opened from different origins, leading to unintended behavior or unauthorized actions within the application.

Technologies: [HCL AION](https://junglewise.ai/threats/technologies/aion). Vendors: [HCL](https://junglewise.ai/threats/vendors/hcl).

## Quick answers

**Is CVE-2026-35113 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-35113 being exploited in the wild.

**How severe is CVE-2026-35113?** Medium severity, with a CVSS score of 4.8, published 6 November 2026.

**Which products and versions are affected?** HCL AION.

**Is there a fix for CVE-2026-35113?** No fixed version is recorded yet. Check the vendor's advisory in the references below. If you run it, Junglewise drafts a mitigation that fits your setup and applies it once you approve, with senior security engineers behind it.

**How is CVE-2026-35113 attacked?** It is attacked over the network, in a web application.

**Am I affected by CVE-2026-35113?** Check whether you run HCL AION. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.

## Technical details

The vulnerability stems from a missing or insecure Cross-Origin-Opener-Policy header, which allows cross-origin documents to share a browsing context with the application and enables cross-window attacks. This is a client-side web security issue that requires user interaction or social engineering to exploit. The vulnerability may result in information disclosure or unintended state changes depending on the application's design.

## Affected products

- HCL AION

## Timeline

- 2026-11-06: disclosed

## References

- [https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0135118](https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0135118)

## Related threats

- [HCL AION weak account lockout brute-force](https://junglewise.ai/threats/cve-2026-66987-hcl-aion-is-affected-by-a-vulnerability-where-the-account-lockout)
- [HCL AION HTTP Host header injection](https://junglewise.ai/threats/cve-2026-66981-hcl-aion-is-affected-by-a-vulnerability-where-the-application)
- [HCL AION missing Cross-Origin-Embedder-Policy header](https://junglewise.ai/threats/cve-2026-35112-hcl-aion-is-affected-by-a-vulnerability-where-the-cross-origin)
- [HCL AION missing cross-origin resource policy header](https://junglewise.ai/threats/cve-2026-35111-hcl-aion-is-affected-by-a-vulnerability-where-the-cross-origin)
- [HCL AION unencrypted communication enforcement](https://junglewise.ai/threats/cve-2026-35110-hcl-aion-is-affected-by-a-vulnerability-where-encrypted-https)