# CVE-2026-56590: HCL BigFix Service Management is affected by multiple security vulnerabilities.

> Unauthenticated attackers can upload malicious files to HCL BigFix Service Management, leading to complete server compromise via code execution.

- **Severity:** Medium 6.4 (`CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:H/I:H/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Over the internet
- **Victim action needed:** A user has to click or open something
- **Fix available:** No
- **Published:** 18 Sep 2026
- **Updated:** 18 Sep 2026
- **Also known as:** GHSA-4929-xpw2-7hx7

## What is CVE-2026-56590?

CVE-2026-56590 is a medium-severity vulnerability in HCL BigFix Service Management, published on 18 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.

### Official description

HCL BigFix Service Management is affected by an Unrestricted File Upload vulnerability due to improper file validation controls, which could allow an unauthenticated attacker to upload and execute malicious payloads, resulting in a complete server compromise.

Weakness: CWE-434 (Unrestricted Upload of File with Dangerous Type)

## Which versions are affected by CVE-2026-56590?

It affects 1 product.


Products: Hcltech Bigfix Service Management.

## How do I fix CVE-2026-56590?

No fix has been published for CVE-2026-56590 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-56590 being exploited?

There is no known exploitation of CVE-2026-56590 in the wild and no public exploit code.

## Other vulnerabilities in HCL BigFix Service Management

- [CVE-2026-67100](https://insights.sbomify.com/CVE-2026-67100/): HCL BigFix Service Management is affected by multiple security vulnerabilities. (critical 9.8)
- [CVE-2026-67101](https://insights.sbomify.com/CVE-2026-67101/): HCL BigFix Service Management is affected by multiple security vulnerabilities. (critical 9.3)
- [CVE-2024-30151](https://insights.sbomify.com/CVE-2024-30151/): HCL BigFix Service Management (SM) is susceptible to Broken Access Control Vulnerability (high 8.3)
- [CVE-2026-67102](https://insights.sbomify.com/CVE-2026-67102/): HCL BigFix Service Management is affected by multiple security vulnerabilities. (high 8.1)
- [CVE-2026-67103](https://insights.sbomify.com/CVE-2026-67103/): HCL BigFix Service Management is affected by multiple security vulnerabilities. (high 7.6)

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56590 and fix it if it is affected.

What it is: CVE-2026-56590 is a medium-severity vulnerability in HCL BigFix Service Management, published on 18 Sep 2026. Any signed-in user can exploit it over the network, and only if a user opens a file or follows a link.
Exploitation: There is no known exploitation of CVE-2026-56590 in the wild and no public exploit code.

Affected product: HCL BigFix Service Management. No package-level version data is available, so check the vendor advisory linked from the reference page.

Task:
1. Search the dependency manifests and lockfiles (for example package.json, package-lock.json, requirements.txt, poetry.lock, uv.lock, pom.xml, build.gradle, go.mod, Cargo.lock, Gemfile.lock) and any Dockerfiles for the affected packages, including transitive dependencies.
2. If an affected version is in use, upgrade it to the fixed version for its release line with the project's package manager, so the lockfile is regenerated. Prefer the smallest upgrade that fixes it.
3. If there is no fix, or the upgrade would break the build, do not guess: explain the risk and the safest workaround instead.
4. Run the tests and summarise what changed and why.
5. If nothing in the project is affected, say so and change nothing.

Reference: https://insights.sbomify.com/CVE-2026-56590/ (Markdown: https://insights.sbomify.com/CVE-2026-56590/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56590
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56590
- OSV: https://osv.dev/vulnerability/CVE-2026-56590

---
From sbomify Insights: https://insights.sbomify.com/CVE-2026-56590/
Summaries are generated and may contain mistakes; the official description above is the record.