Usually no. A vendor in SOC 2 vendor management is a third party you have a relationship with, often a contract, that touches your systems or data. A free library has no contract and no obligations to you. But the risk is real, so cover it through dependency controls rather than a vendor review form.
Why teams get confused
Vendor management asks how you evaluate and monitor third parties. Open-source libraries are third parties in the plain sense: someone else wrote the code, and you run it with access to your data. So an auditor may ask whether your process considers them.
You can answer without pretending maintainers are suppliers. The usual position is that hosted services and paid software go through the vendor process, while open-source packages are governed by the dependency and change management controls.
Where the line usually falls
| Third party | Typical home |
|---|---|
| Cloud provider, payment processor, support tool | Vendor register |
| Paid SDK or commercial component | Vendor register |
| Free library from a package registry | Dependency controls |
| Open-source project you depend on heavily | Dependency controls, with added attention |
| Hosted service built on open-source software | Vendor register |
State this division in your policy so nobody has to guess.
What dependency controls replace
A vendor review checks whether the supplier is trustworthy and monitors them. The equivalent for a library is:
- A check when a new package is added: who maintains it, how active it is, license, known advisories.
- Version pinning, so you choose when to take new code.
- Ongoing scanning for known vulnerabilities.
- A removal path when a project is abandoned.
None of that needs a signed questionnaire. It needs a lightweight approval in the pull request that adds the package. NIST's Secure Software Development Framework, SP 800-218, is a reasonable reference point for what a producer should do about third-party components, and its stated aim includes helping producers reduce vulnerabilities in released software.
Edge cases worth deciding
- A critical library backed by one maintainer. Write it on a short watch list and note a fallback.
- A commercially supported open-source product. If you pay for support, it is a vendor.
- Copied code. Vendored or pasted code is yours to maintain. Track it in your inventory.
Say it simply to a buyer
A truthful sentence works: "Hosted services and paid components go through vendor review. Open-source libraries are tracked in an inventory, scanned for known vulnerabilities, and added through reviewed pull requests." That avoids implying contracts that do not exist.
Where Safeguard fits
Safeguard's SBOM and dependency scanning give the inventory and monitoring half of this, and policies can flag packages that break your approval rules. Try a free scan at https://gold.safeguard.sh/scan.
Quick check
Do I need a risk assessment for every npm package?
No. Apply a light check at the moment a package is added, and rely on scanning afterward. Spend deeper review on packages that are critical or unusual.
Does a hosted service built on open source count as a vendor?
Yes. If someone operates it for you and it touches your data, it belongs in the vendor register.
Sources
Last reviewed: 19 October 2026.
