CVE-2026-56599 HCL BigFix Service Management is affected by multiple security vulnerabilities.

Low 2.2 Published 1 Oct 2026 Updated 1 Oct 2026

Missing cookie security attributes in HCL BigFix Service Management allow attackers to perform CSRF and session hijacking, leading to unauthorized access.

Exploited in the wild: Not known
Login needed: Any signed-in user
Attackable: Local or same network only
Victim action needed: A user has to click or open something
Fix: None listed

What is CVE-2026-56599?

CVE-2026-56599 is a low-severity vulnerability in HCL BigFix Service Management, published on 1 Oct 2026. It can only be exploited from the same machine or local network, and only if a user opens a file or follows a link.

Official description

HCL BigFix Service Management is affected by an Insecure Cookie Attribute Configuration vulnerability, which could allow an attacker to exploit missing security attributes such as SameSite, HttpOnly, Secure, and restrictive Paths, enabling Cross-Site Request Forgery (CSRF), session hijacking via Cross-Site Scripting (XSS), and unauthorized access.

Weakness: CWE-614

Which versions are affected by CVE-2026-56599?

It affects 1 product.

Products include Hcltech Bigfix Service Management.

How do I fix CVE-2026-56599?

No fix has been published for CVE-2026-56599 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-56599 being exploited?

There is no known exploitation of CVE-2026-56599 in the wild and no public exploit code.

Sources

Also known as GHSA-5f5p-47q4-96cg.