npm package report

Is fastify safe?

fastify (npm) has 18 known vulnerabilities, the worst rated HIGH. Upgrade to 5.12.6 or later to clear all of them. No malicious-package signal is recorded.

// reach

15 direct dependencies

2 carry known advisories, worst HIGH

87 packages depend on it

an advisory here reaches each of them

Create a free accountfor every dependency path, dependent and what to upgrade

// ai model usage

Tracked for PyPI packages. HuggingFace models declare Python dependencies, so npm packages are not covered.

cvss

7.5

high

CVSS v3.1 base score out of 10

epss

0.49%

medium

chance of exploitation in 30 days, 43rd percentile of all CVEs

xyz score

4.7

medium

CyberXYZ composite out of 10

fig. 01 — GHSA-hwr6-493r-vm6h, the advisory selected below

// 18 advisories

GHSA-hwr6-493r-vm6h

HIGHGitHub ratingCVE-2026-84469

Fastify decided whether to validate a request part by checking its schema for JavaScript truthiness.

Full advisory text at GitHub advisory or NVD.

// cvss v3.1 vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:H/A:N

Attack vector: Network
Attack complexity: Low
Privileges required: None
User interaction: None
Scope: Unchanged
Confidentiality: None
Integrity: High
Availability: None

// questions

Is fastify safe to install?

CyberXYZ does not call a package safe in absolute terms. It records 18 known vulnerabilities for fastify (npm), the worst rated HIGH, and no malicious-package signal. Whether it is acceptable depends on the version you run.

Does fastify have known vulnerabilities?

Yes. CyberXYZ records 18 known vulnerabilities for fastify (npm), the worst rated HIGH. These include GHSA-hwr6-493r-vm6h, GHSA-9q9j-q6p8-xq58, GHSA-p68q-wchp-6fh7, GHSA-667r-xxjv-c9mm, GHSA-247c-9743-5963.

Which version of fastify should I use?

5.12.6 or later clears every advisory recorded for fastify (npm). Check the release you pick before installing it.

How do I check fastify before installing?

Search fastify in CyberXYZ Check at https://cyberxyz.io/check?q=fastify. The xyz Scanner checks a project's dependencies, and CyberXYZ Proxy checks each package as it is installed.

Checked 2026-11-14 at 07:04 UTC. The most recent advisory here was published 2026-10-22. Updated continuously from NVD, GHSA, OSV and CNA feeds.