# CVE-2026-56596: HCL BigFix Service Management is affected by multiple security vulnerabilities.

> Attackers can exploit improper input validation to bypass business logic and cause unintended application behavior in HCL BigFix Service Management.

- **Severity:** Low 3.5 (`CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:N/I:L/A:N`)
- **Exploited in the wild:** Not known
- **Login needed:** Any signed-in user
- **Attackable:** Local or same network only
- **Victim action needed:** Not needed
- **Fix available:** No
- **Published:** 6 Oct 2026
- **Updated:** 6 Oct 2026
- **Also known as:** GHSA-4wg9-7x2v-7wxf

## What is CVE-2026-56596?

CVE-2026-56596 is a low-severity vulnerability in HCL BigFix Service Management, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.

### Official description

HCL BigFix Service Management is affected by an Improper Input Validation vulnerability, which could allow an attacker to supply unexpected or malformed data, enabling processing errors, business logic bypasses, and unintended application behavior.

Weakness: CWE-20 (Improper Input Validation)

## Which versions are affected by CVE-2026-56596?


## How do I fix CVE-2026-56596?

No fix has been published for CVE-2026-56596 yet. Limit exposure of the affected software until one is available.

## Is CVE-2026-56596 being exploited?

There is no known exploitation of CVE-2026-56596 in the wild and no public exploit code.

## Fix prompt for AI coding agents

```text
Check this codebase for CVE-2026-56596 and fix it if it is affected.

What it is: CVE-2026-56596 is a low-severity vulnerability in HCL BigFix Service Management, published on 6 Oct 2026. It can only be exploited from the same machine or local network, with no action from the victim.
Exploitation: There is no known exploitation of CVE-2026-56596 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-2026-56596/ (Markdown: https://insights.sbomify.com/CVE-2026-56596/index.md)
```

## Sources

- CVE record: https://www.cve.org/CVERecord?id=CVE-2026-56596
- NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-56596
- OSV: https://osv.dev/vulnerability/CVE-2026-56596

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From sbomify Insights: https://insights.sbomify.com/CVE-2026-56596/
Summaries are generated and may contain mistakes; the official description above is the record.