{"id":"EUVD-2026-22880","revision":"0c577fabb4f949fca6040d5c41d4bb58","records":[{"revision":"0c577fabb4f949fca6040d5c41d4bb58","observedAt":"2026-10-30T05:00:15.622+00:00","statement":{"source":"euvd","id":"EUVD-2026-22880","aliases":["CVE-2026-33807"],"title":"@fastify/express v4.0.4 and earlier contains a path handling bug in the onRegister function that causes middleware paths to be doubled when inherited by child plugins. When a child plugin is registered with a prefix that matches a middlewar…","description":"@fastify/express v4.0.4 and earlier contains a path handling bug in the onRegister function that causes middleware paths to be doubled when inherited by child plugins. When a child plugin is registered with a prefix that matches a middleware path, the middleware path is prefixed a second time, causing it to never match incoming requests. This results in complete bypass of Express middleware security controls, including authentication, authorization, and rate limiting, for all routes defined within affected child plugin scopes. No special configuration or request crafting is required.\n\nUpgrade to @fastify/express v4.0.5 or later.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","score":9.1,"severity":null}],"references":["https://github.com/fastify/fastify-express/security/advisories/GHSA-hrwm-hgmj-7p9c","https://cna.openjsf.org/security-advisories.html"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-22880","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Apr 15, 2026, 9:52:26 AM","dateUpdated":"Apr 15, 2026, 1:09:45 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-22880","identifiers":["EUVD-2026-22880","CVE-2026-33807"]},"retained":false,"historicalAffected":[]}],"coverage":[]}