Technology · Fastify
Fastify-Express vulnerabilities
Updated . Rebuilt every hour.
Junglewise Threat Intelligence has tracked 9 vulnerabilities in Fastify-Express: 0 in the last 7 days and 1 in the last 90 days, 3 of them critical and 0 exploited in the wild. The most recent, CVE-2026-6556, was published on 30 June 2026.
- Last 7 days
- 0
- Last 90 days
- 1
- Critical, all time
- 3
- Exploited in the wild
- 0
About Fastify-Express
A plugin for Fastify that adds support for Express.js middleware and applications.
Latest Fastify-Express vulnerabilities
- CVE-2026-6556: Fastify @fastify/express middleware bypass via non-string mount pathscriticalCVSS 9.1
- CVE-2026-33808: Fastify @fastify/express auth bypass via URL normalization gapscriticalCVSS 9.1EPSS 0.5%
- CVE-2026-33807: Fastify @fastify/express middleware bypass in child plugin scopescriticalCVSS 9.1EPSS 0.5%
- CVE-2026-22037: Fastify @fastify/express middleware bypass via URL encodinglowCVSS 3.1EPSS 0.4%
- CVE-2024-51999: Express extended query parser prototype pollutionmediumCVSS 4
- CVE-2024-10491: Express resource injection in Link headerlowCVSS 3.1EPSS 0.4%
- CVE-2024-9266: Express open redirect vulnerabilitylowCVSS 3.1EPSS 0.5%
- CVE-2024-43796: Express XSS via response.redirect()lowCVSS 3.1EPSS 0.5%
- CVE-2024-29041: Express.js open redirect in malformed URLslowCVSS 3.1EPSS 0.8%
Most severe Fastify-Express vulnerabilities
Exploited in the wild first, then by severity and CVSS score.
- CVE-2026-33808: Fastify @fastify/express auth bypass via URL normalization gapscriticalCVSS 9.1EPSS 0.5%
- CVE-2026-33807: Fastify @fastify/express middleware bypass in child plugin scopescriticalCVSS 9.1EPSS 0.5%
- CVE-2026-6556: Fastify @fastify/express middleware bypass via non-string mount pathscriticalCVSS 9.1
- CVE-2024-51999: Express extended query parser prototype pollutionmediumCVSS 4
- CVE-2024-29041: Express.js open redirect in malformed URLslowCVSS 3.1EPSS 0.8%
- CVE-2024-43796: Express XSS via response.redirect()lowCVSS 3.1EPSS 0.5%
- CVE-2024-9266: Express open redirect vulnerabilitylowCVSS 3.1EPSS 0.5%
- CVE-2024-10491: Express resource injection in Link headerlowCVSS 3.1EPSS 0.4%
- CVE-2026-22037: Fastify @fastify/express middleware bypass via URL encodinglowCVSS 3.1EPSS 0.4%
Vulnerabilities per week
The last 13 weeks, by the week each vulnerability was published.
| Week of | Bar | Vulns | Critical |
|---|---|---|---|
| 6 Jul 2026 | 0 | 0 | |
| 13 Jul 2026 | 0 | 0 | |
| 20 Jul 2026 | 0 | 0 | |
| 27 Jul 2026 | 0 | 0 | |
| 3 Aug 2026 | 0 | 0 | |
| 10 Aug 2026 | 0 | 0 | |
| 17 Aug 2026 | 0 | 0 | |
| 24 Aug 2026 | 0 | 0 | |
| 31 Aug 2026 | 0 | 0 | |
| 7 Sep 2026 | 0 | 0 | |
| 14 Sep 2026 | 0 | 0 | |
| 21 Sep 2026 | 0 | 0 | |
| 28 Sep 2026 | 0 | 0 |
How this is built
Junglewise Threat Intelligence collects vulnerabilities from NVD, GitHub Security Advisories, OSV, the CISA Known Exploited Vulnerabilities catalog, FIRST EPSS and vendor advisories, and matches each one to the technologies and vendors it affects. Dates are the date a vulnerability was published, in UTC.
The pages are rebuilt from the database every hour. Frozen weekly and monthly reports never change once published, so they can be cited.
Use this data
The same data is at https://junglewise.ai/threats/technologies/express.json, for scripts and language models. It is free to reuse under CC BY 4.0 with a link back to this page.
Cite as: Junglewise Threat Intelligence, "Fastify-Express vulnerabilities", https://junglewise.ai/threats/technologies/express, 28 September 2026.