# CVE-2026-56586: HCL IntelliOps Event Management missing X-Content-Type-Options header

Source: https://junglewise.ai/threats/cve-2026-56586-hcl-intelliops-event-management-missing-x-content-type-options  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-07-21. Updated: 2026-07-21  
License: CC BY 4.0 with a link back

CVE-2026-56586 · Severity: low · CVSS 3.1 · Published 2026-07-21

HCL IntelliOps Event Management, a tool used for monitoring and managing IT infrastructure events, is missing a security configuration that helps prevent web browsers from misinterpreting file types. This oversight could potentially allow an attacker to perform man-in-the-middle attacks, leading to the interception of sensitive data or unauthorized changes to information. While the risk is rated as low, it represents a weakness in how the application secures its communications with users.

Technologies: [HCL Software IntelliOps Event Management](https://junglewise.ai/threats/technologies/intelliops-event-management). Vendors: [HCL Software](https://junglewise.ai/threats/vendors/hcl-software).

## Quick answers

**Is CVE-2026-56586 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-56586 being exploited in the wild.

**How severe is CVE-2026-56586?** Low severity, with a CVSS score of 3.1, published 21 July 2026.

**Which products and versions are affected?** HCL Software IntelliOps Event Management 1.1.

**Is there a fix for CVE-2026-56586?** 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-2026-56586 attacked?** It is attacked over the network, in a network appliance.

**Am I affected by CVE-2026-56586?** Check whether you run HCL Software IntelliOps Event Management at an affected version. 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

HCL IntelliOps Event Management (IEM) version 1.1 fails to implement the 'X-Content-Type-Options: nosniff' HTTP response header. This configuration weakness (CWE-16) allows browsers to perform MIME-type sniffing, which can be leveraged by a network-based attacker to execute man-in-the-middle (MITM) or SSL stripping attacks. By forcing a browser to interpret a response as a different content type than intended, an attacker may intercept sensitive data or perform unauthorized modifications. The attack requires a high degree of complexity and user interaction to be successful.

## Affected products

- HCL Software IntelliOps Event Management 1.1

## Timeline

- 2026-07-21: advisory: Initial advisory published by HCL Software and NVD.

## References

- [https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0132378](https://support.hcl-software.com/csm?id=kb_article&sysparm_article=KB0132378)

## Related threats

- [HCL IntelliOps Event Management missing HSTS enforcement](https://junglewise.ai/threats/cve-2026-56587-hcl-intelliops-event-management-missing-hsts-enforcement)
- [HCL IntelliOps Event Management Information Disclosure in Nginx server](https://junglewise.ai/threats/cve-2026-56584-hcl-intelliops-event-management-information-disclosure-in-nginx)