CVE-2026-112712
- Source
- https://cve.org/CVERecord?id=CVE-2026-112712
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-112712.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-112712
- Aliases
-
- GHSA-5p92-8765-9fv8
- Published
- 2026-10-20T20:43:48Z
- Modified
- 2026-10-21T10:45:45Z
- Severity
-
- 9.1 (Critical) CVSS_V3 - CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N CVSS Calculator
- Summary
- @fastify/middie vulnerable to path-scoped middleware bypass via scope prefix mismatch
- Details
-
@fastify/middie is the Express-style middleware engine for Fastify. In versions from 9.0.0 through 9.3.5, the use() function joined a path-scoped middleware's mount path to the plugin scope prefix in a way that could diverge from the path Fastify's router serves, most often when the scope prefix ended in a slash, and also for array mount paths and for mount paths written without a leading slash. When the two paths disagreed, the middleware was silently skipped while the route handler still ran, so path-scoped middleware such as authentication, authorization, or rate limiting could be bypassed by a single unauthenticated request. The issue is fixed in @fastify/middie 9.3.6, and users should upgrade to 9.3.6 or later. As a workaround, enforce authorization in a Fastify hook such as preHandler that runs after the router has resolved the request.
- Database specific
{ "cna_assigner": "openjs", "cwe_ids": [ "CWE-436" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/112xxx/CVE-2026-112712.json" }- References