# Fastify Busboy vulnerabilities

Source: https://junglewise.ai/threats/technologies/busboy  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour.  
Data: https://junglewise.ai/threats/technologies/busboy.json  
License: CC BY 4.0 with a link back

Junglewise Threat Intelligence has tracked 3 vulnerabilities in Fastify Busboy: 0 in the last 7 days and 2 in the last 90 days, 0 of them critical and 0 exploited in the wild. The most recent, CVE-2026-19481, was published on 2 October 2026. Nothing in the last four weeks, down from 1 vulnerability in the four before.

## Counts

- Last 7 days: 0
- Last 30 days: 0
- Last 90 days: 2
- All time: 3 (0 critical, 0 exploited in the wild)

## About Fastify Busboy

Node.js library for parsing multipart form data and file uploads in HTTP requests.

## Latest Fastify Busboy vulnerabilities

- [CVE-2026-19481: @fastify/busboy denial of service via prototype-named multipart header](https://junglewise.ai/threats/cve-2026-19481-fastify-busboy-vulnerable-to-denial-of-service-via-prototype) (high, CVSS 7.5, published 2 Oct 2026)
- [CVE-2026-74866: @fastify/busboy CRLF injection in multipart headers](https://junglewise.ai/threats/cve-2026-74866-fastify-busboy-crlf-injection-in-multipart-headers) (medium, CVSS 5.8, published 21 Aug 2026)
- [CVE-2026-19484: Fastify busboy denial of service via oversized multipart boundary](https://junglewise.ai/threats/cve-2026-19484-fastify-busboy-denial-of-service-via-oversized-multipart-boundary) (high, CVSS 7.5, published 13 Aug 2026)

## Most severe Fastify Busboy vulnerabilities

- [CVE-2026-19484: Fastify busboy denial of service via oversized multipart boundary](https://junglewise.ai/threats/cve-2026-19484-fastify-busboy-denial-of-service-via-oversized-multipart-boundary) (high, CVSS 7.5, published 13 Aug 2026)
- [CVE-2026-19481: @fastify/busboy denial of service via prototype-named multipart header](https://junglewise.ai/threats/cve-2026-19481-fastify-busboy-vulnerable-to-denial-of-service-via-prototype) (high, CVSS 7.5, published 2 Oct 2026)
- [CVE-2026-74866: @fastify/busboy CRLF injection in multipart headers](https://junglewise.ai/threats/cve-2026-74866-fastify-busboy-crlf-injection-in-multipart-headers) (medium, CVSS 5.8, published 21 Aug 2026)

## Vulnerabilities per week

Nothing in the last four weeks, down from 1 vulnerability in the four before.

| Week of | Vulns | Critical | Exploited |
| --- | --- | --- | --- |
| 17 Aug 2026 | 1 | 0 | 0 |
| 24 Aug 2026 | 0 | 0 | 0 |
| 31 Aug 2026 | 0 | 0 | 0 |
| 7 Sep 2026 | 0 | 0 | 0 |
| 14 Sep 2026 | 0 | 0 | 0 |
| 21 Sep 2026 | 0 | 0 | 0 |
| 28 Sep 2026 | 1 | 0 | 0 |
| 5 Oct 2026 | 0 | 0 | 0 |
| 12 Oct 2026 | 0 | 0 | 0 |
| 19 Oct 2026 | 0 | 0 | 0 |
| 26 Oct 2026 | 0 | 0 | 0 |
| 2 Nov 2026 | 0 | 0 | 0 |
| 9 Nov 2026 | 0 | 0 | 0 |

## Other Fastify technologies

- [Fastify-Express](https://junglewise.ai/threats/technologies/express): 9 vulnerabilities
- [Fastify Http-Proxy](https://junglewise.ai/threats/technologies/http-proxy): 7 vulnerabilities
- [Fastify Middie](https://junglewise.ai/threats/technologies/middie): 7 vulnerabilities
- [Fastify Multipart](https://junglewise.ai/threats/technologies/multipart): 4 vulnerabilities
- [Fastify Reply-From](https://junglewise.ai/threats/technologies/reply-from): 4 vulnerabilities
- [Fastify-Static](https://junglewise.ai/threats/technologies/static): 4 vulnerabilities

## Sources

NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories. Rebuilt every hour. Cite as: Junglewise Threat Intelligence, "Fastify Busboy vulnerabilities", https://junglewise.ai/threats/technologies/busboy, 12 November 2026.