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.