# Fastify-Express vulnerabilities Source: https://junglewise.ai/threats/technologies/express Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 9 November 2026, 19:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/technologies/express.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 9 vulnerabilities in Fastify-Express: 0 in the last 7 days and 0 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. ## Counts - Last 7 days: 0 - Last 30 days: 0 - Last 90 days: 0 - All time: 9 (3 critical, 0 exploited in the wild) ## 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 paths](https://junglewise.ai/threats/cve-2026-6556-fastify-fastify-express-middleware-bypass-via-non-string-mount) (critical, CVSS 9.1, published 30 Jun 2026) - [CVE-2026-33808: Fastify @fastify/express auth bypass via URL normalization gaps](https://junglewise.ai/threats/cve-2026-33808-fastify-fastify-express-auth-bypass-via-url-normalization-gaps) (critical, CVSS 9.1, published 15 Apr 2026) - [CVE-2026-33807: Fastify @fastify/express middleware bypass in child plugin scopes](https://junglewise.ai/threats/cve-2026-33807-fastify-fastify-express-middleware-bypass-in-child-plugin-scopes) (critical, CVSS 9.1, published 15 Apr 2026) - [CVE-2026-22037: Fastify @fastify/express middleware bypass via URL encoding](https://junglewise.ai/threats/cve-2026-22037-fastify-fastify-express-middleware-bypass-via-url-encoding) (low, CVSS 3.1, published 20 Jan 2026) - [CVE-2024-51999: Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. Reason: This candidate was issued in error and is not a…](https://junglewise.ai/threats/cve-2024-51999-express-extended-query-parser-prototype-pollution) (medium, CVSS 4, published 1 Dec 2025) - [CVE-2024-10491: Express resource injection in Link header](https://junglewise.ai/threats/cve-2024-10491-express-resource-injection-in-link-header) (low, CVSS 3.1, published 29 Oct 2024) - [CVE-2024-9266: Express open redirect vulnerability](https://junglewise.ai/threats/cve-2024-9266-express-open-redirect-vulnerability) (low, CVSS 3.1, published 3 Oct 2024) - [CVE-2024-43796: Express XSS via response.redirect()](https://junglewise.ai/threats/cve-2024-43796-express-xss-via-response-redirect) (low, CVSS 3.1, published 10 Sep 2024) - [CVE-2024-29041: Express.js open redirect in malformed URLs](https://junglewise.ai/threats/cve-2024-29041-express-js-open-redirect-in-malformed-urls) (low, CVSS 3.1, published 25 Mar 2024) ## Most severe Fastify-Express vulnerabilities - [CVE-2026-33808: Fastify @fastify/express auth bypass via URL normalization gaps](https://junglewise.ai/threats/cve-2026-33808-fastify-fastify-express-auth-bypass-via-url-normalization-gaps) (critical, CVSS 9.1, published 15 Apr 2026) - [CVE-2026-33807: Fastify @fastify/express middleware bypass in child plugin scopes](https://junglewise.ai/threats/cve-2026-33807-fastify-fastify-express-middleware-bypass-in-child-plugin-scopes) (critical, CVSS 9.1, published 15 Apr 2026) - [CVE-2026-6556: Fastify @fastify/express middleware bypass via non-string mount paths](https://junglewise.ai/threats/cve-2026-6556-fastify-fastify-express-middleware-bypass-via-non-string-mount) (critical, CVSS 9.1, published 30 Jun 2026) - [CVE-2024-51999: Rejected reason: ** REJECT ** DO NOT USE THIS CANDIDATE NUMBER. Reason: This candidate was issued in error and is not a…](https://junglewise.ai/threats/cve-2024-51999-express-extended-query-parser-prototype-pollution) (medium, CVSS 4, published 1 Dec 2025) - [CVE-2024-29041: Express.js open redirect in malformed URLs](https://junglewise.ai/threats/cve-2024-29041-express-js-open-redirect-in-malformed-urls) (low, CVSS 3.1, published 25 Mar 2024) - [CVE-2024-43796: Express XSS via response.redirect()](https://junglewise.ai/threats/cve-2024-43796-express-xss-via-response-redirect) (low, CVSS 3.1, published 10 Sep 2024) - [CVE-2024-9266: Express open redirect vulnerability](https://junglewise.ai/threats/cve-2024-9266-express-open-redirect-vulnerability) (low, CVSS 3.1, published 3 Oct 2024) - [CVE-2024-10491: Express resource injection in Link header](https://junglewise.ai/threats/cve-2024-10491-express-resource-injection-in-link-header) (low, CVSS 3.1, published 29 Oct 2024) - [CVE-2026-22037: Fastify @fastify/express middleware bypass via URL encoding](https://junglewise.ai/threats/cve-2026-22037-fastify-fastify-express-middleware-bypass-via-url-encoding) (low, CVSS 3.1, published 20 Jan 2026) ## Vulnerabilities per week Nothing was published in the last eight weeks. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 0 | 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 | 0 | 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 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 - [Fastify Busboy](https://junglewise.ai/threats/technologies/busboy): 3 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-Express vulnerabilities", https://junglewise.ai/threats/technologies/express, 9 November 2026.