# Fastify vulnerabilities Source: https://junglewise.ai/threats/vendors/fastify Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats Updated: 12 November 2026, 03:07 UTC. Rebuilt every hour. Data: https://junglewise.ai/threats/vendors/fastify.json License: CC BY 4.0 with a link back Junglewise Threat Intelligence has tracked 38 vulnerabilities in Fastify: 0 in the last 7 days and 11 in the last 90 days, 9 of them critical and 0 exploited in the wild. The most recent, CVE-2026-120214, was published on 2 November 2026. 6 vulnerabilities in the last four weeks, up 500% on the four before (1). 1 critical against 0. 7 technologies have a page of their own. ## Counts - Last 7 days: 0 - Last 30 days: 6 - Last 90 days: 11 - All time: 38 (9 critical, 0 exploited in the wild) ## About Fastify An open-source web framework for Node.js focused on low overhead and plugin architecture. ## Latest Fastify vulnerabilities - [CVE-2026-120214: @fastify/http-proxy path traversal via percent-encoded backslash](https://junglewise.ai/threats/cve-2026-120214-fastify-http-proxy-is-a-fastify-plugin-that-proxies-http) (medium, CVSS 5.9, published 2 Nov 2026) - [CVE-2026-117531: @fastify/multipart denial of service via malformed upload](https://junglewise.ai/threats/cve-2026-117531-fastify-multipart-is-the-multipart-form-data-and-file-upload) (medium, CVSS 5.9, published 2 Nov 2026) - [CVE-2026-112712: @fastify/middie path-scoped middleware bypass via scope prefix mismatch](https://junglewise.ai/threats/cve-2026-112712-fastify-middie-is-the-express-style-middleware-engine-for) (critical, CVSS 9.1, published 20 Oct 2026) - [CVE-2026-110306: fast-uri URI scheme spoofing via percent-encoded scheme](https://junglewise.ai/threats/cve-2026-110306-fast-uri-is-a-dependency-free-rfc-3986-uri-parser-and-serializer) (medium, CVSS 6.1, published 20 Oct 2026) - [CVE-2026-110008: @fastify/oauth2 login CSRF via state cookie not cleared after callback](https://junglewise.ai/threats/cve-2026-110008-fastify-oauth2-is-a-fastify-wrapper-for-oauth2-login-flows-in) (medium, CVSS 4.2, published 19 Oct 2026) - [CVE-2026-110024: @fastify/jwt missing token expiration via options replacement](https://junglewise.ai/threats/cve-2026-110024-fastify-jwt-is-a-jwt-utility-plugin-for-fastify-in-versions) (medium, CVSS 6.8, published 18 Oct 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-2026-75021: fastify-cli remote code execution via ignored Inspector bind address](https://junglewise.ai/threats/cve-2026-75021-fastify-cli-remote-code-execution-via-ignored-inspector-bind) (high, CVSS 8.1, published 8 Sep 2026) - [CVE-2026-85184: @fastify/middie path-scoped middleware bypass via absolute-form request](https://junglewise.ai/threats/cve-2026-85184-fastify-middie-path-scoped-middleware-bypass-via-absolute-form) (critical, CVSS 9.1, published 4 Sep 2026) - [CVE-2026-85124: @fastify/http-proxy path traversal via backslash dot-segments](https://junglewise.ai/threats/cve-2026-85124-fastify-http-proxy-path-traversal-via-backslash-dot-segments) (high, CVSS 7.5, published 3 Sep 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) - [CVE-2026-15144: Fastify @fastify/rate-limit rate-limit bypass via IPv6 address rotation](https://junglewise.ai/threats/cve-2026-15144-fastify-fastify-rate-limit-rate-limit-bypass-via-ipv6-address) (high, CVSS 7.3, published 29 Jul 2026) - [CVE-2026-18174: Fastify @fastify/forwarded improper input validation in X-Forwarded-For header](https://junglewise.ai/threats/cve-2026-18174-fastify-fastify-forwarded-improper-input-validation-in-x) (medium, CVSS 5.3, published 29 Jul 2026) - [CVE-2026-7120: Fastify @fastify/static authorization bypass via non-canonical paths](https://junglewise.ai/threats/cve-2026-7120-fastify-fastify-static-authorization-bypass-via-non-canonical) (medium, CVSS 5.3, published 23 Jul 2026) - [CVE-2026-15074: Fastify @fastify/static route guard bypass via path traversal](https://junglewise.ai/threats/cve-2026-15074-fastify-fastify-static-route-guard-bypass-via-path-traversal) (high, CVSS 7.5, published 23 Jul 2026) - [CVE-2026-16117: Fastify @fastify/http-proxy prefix rewrite bypass via URL-encoded characters](https://junglewise.ai/threats/cve-2026-16117-fastify-fastify-http-proxy-prefix-rewrite-bypass-via-url-encoded) (critical, CVSS 10, published 18 Jul 2026) - [CVE-2026-16158: Fastify @fastify/reply-from cross-upstream request routing via cache collision](https://junglewise.ai/threats/cve-2026-16158-fastify-fastify-reply-from-cross-upstream-request-routing-via) (high, CVSS 8.7, published 18 Jul 2026) - [CVE-2026-15631: Fastify @fastify/http-proxy path traversal in WebSocket path resolution](https://junglewise.ai/threats/cve-2026-15631-fastify-fastify-http-proxy-path-traversal-in-websocket-path) (high, CVSS 8.7, published 18 Jul 2026) - [CVE-2026-14198: Fastify @fastify/middie authorization bypass via encoded slash in path parameters](https://junglewise.ai/threats/cve-2026-14198-fastify-fastify-middie-authorization-bypass-via-encoded-slash-in) (critical, CVSS 9.1, published 1 Jul 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-2026-7768: Fastify @fastify/accepts-serializer denial of service via unbounded cache growth](https://junglewise.ai/threats/cve-2026-7768-fastify-fastify-accepts-serializer-denial-of-service-via-unbounded) (high, CVSS 7.5, published 4 May 2026) - [CVE-2026-6410: Fastify @fastify/static path traversal in directory listing](https://junglewise.ai/threats/cve-2026-6410-fastify-fastify-static-path-traversal-in-directory-listing) (medium, CVSS 5.3, published 16 Apr 2026) - [CVE-2026-6414: Fastify @fastify/static route guard bypass via encoded path separators](https://junglewise.ai/threats/cve-2026-6414-fastify-fastify-static-route-guard-bypass-via-encoded-path) (medium, CVSS 5.9, published 16 Apr 2026) - [CVE-2026-33804: Fastify @fastify/middie middleware bypass via duplicate slashes](https://junglewise.ai/threats/cve-2026-33804-fastify-fastify-middie-middleware-bypass-via-duplicate-slashes) (high, CVSS 7.4, published 16 Apr 2026) ## Most severe Fastify vulnerabilities - [CVE-2026-16117: Fastify @fastify/http-proxy prefix rewrite bypass via URL-encoded characters](https://junglewise.ai/threats/cve-2026-16117-fastify-fastify-http-proxy-prefix-rewrite-bypass-via-url-encoded) (critical, CVSS 10, published 18 Jul 2026) - [CVE-2026-6270: Fastify @fastify/middie authentication bypass in child plugin scopes](https://junglewise.ai/threats/cve-2026-6270-fastify-fastify-middie-middleware-bypass-in-child-plugin-scopes) (critical, CVSS 9.1, published 16 Apr 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-2026-85184: @fastify/middie path-scoped middleware bypass via absolute-form request](https://junglewise.ai/threats/cve-2026-85184-fastify-middie-path-scoped-middleware-bypass-via-absolute-form) (critical, CVSS 9.1, published 4 Sep 2026) - [CVE-2026-2880: Fastify @fastify/middie auth bypass via improper path normalization](https://junglewise.ai/threats/cve-2026-2880-fastify-fastify-middie-auth-bypass-via-improper-path-normalization) (critical, CVSS 9.1, published 27 Feb 2026) - [CVE-2026-112712: @fastify/middie path-scoped middleware bypass via scope prefix mismatch](https://junglewise.ai/threats/cve-2026-112712-fastify-middie-is-the-express-style-middleware-engine-for) (critical, CVSS 9.1, published 20 Oct 2026) - [CVE-2026-14198: Fastify @fastify/middie authorization bypass via encoded slash in path parameters](https://junglewise.ai/threats/cve-2026-14198-fastify-fastify-middie-authorization-bypass-via-encoded-slash-in) (critical, CVSS 9.1, published 1 Jul 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-2026-16158: Fastify @fastify/reply-from cross-upstream request routing via cache collision](https://junglewise.ai/threats/cve-2026-16158-fastify-fastify-reply-from-cross-upstream-request-routing-via) (high, CVSS 8.7, published 18 Jul 2026) ## Vulnerabilities per week 6 vulnerabilities in the last four weeks, up 500% on the four before (1). 1 critical against 0. | Week of | Vulns | Critical | Exploited | | --- | --- | --- | --- | | 17 Aug 2026 | 1 | 0 | 0 | | 24 Aug 2026 | 0 | 0 | 0 | | 31 Aug 2026 | 2 | 1 | 0 | | 7 Sep 2026 | 1 | 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 | 1 | 0 | 0 | | 19 Oct 2026 | 3 | 1 | 0 | | 26 Oct 2026 | 0 | 0 | 0 | | 2 Nov 2026 | 2 | 0 | 0 | | 9 Nov 2026 | 0 | 0 | 0 | ## 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 - [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 vulnerabilities", https://junglewise.ai/threats/vendors/fastify, 12 November 2026.