{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-6414","assignerOrgId":"ce714d77-add3-4f53-aff5-83d477b104bb","state":"PUBLISHED","assignerShortName":"openjs","dateReserved":"2026-04-15T23:37:33.949Z","datePublished":"2026-04-16T13:09:03.526Z","dateUpdated":"2026-04-16T13:48:52.393Z"},"containers":{"cna":{"providerMetadata":{"orgId":"ce714d77-add3-4f53-aff5-83d477b104bb","shortName":"openjs","dateUpdated":"2026-04-16T13:09:03.526Z"},"descriptions":[{"lang":"en","value":"@fastify/static versions 8.0.0 through 9.1.0 decode percent-encoded path separators (%2F) before filesystem resolution, while Fastify's router treats them as literal characters. This mismatch allows attackers to bypass route-based middleware or guards that protect files served by @fastify/static. For example, a route guard on a protected path can be circumvented by encoding the path separator in the URL. Upgrade to @fastify/static 9.1.1 to fix this issue. There are no workarounds.","supportingMedia":[{"type":"text/html","base64":false,"value":"@fastify/static versions 8.0.0 through 9.1.0 decode percent-encoded path separators (%2F) before filesystem resolution, while Fastify's router treats them as literal characters. This mismatch allows attackers to bypass route-based middleware or guards that protect files served by @fastify/static. For example, a route guard on a protected path can be circumvented by encoding the path separator in the URL. Upgrade to @fastify/static 9.1.1 to fix this issue. There are no workarounds."}]}],"affected":[{"vendor":"@fastify/static","product":"@fastify/static","defaultStatus":"unaffected","versions":[{"versionType":"semver","status":"affected","version":"8.0.0","lessThan":"9.1.1"},{"versionType":"semver","status":"unaffected","version":"9.1.1"}],"packageURL":"pkg:npm/@fastify/static"}],"references":[{"url":"https://github.com/fastify/middie/security/advisories/GHSA-cxrg-g7r8-w69p"},{"url":"https://github.com/honojs/hono/security/advisories/GHSA-q5qw-h33p-qvwr"},{"url":"https://github.com/fastify/fastify-static/security/advisories/GHSA-x428-ghpx-8j92"},{"url":"https://cna.openjsf.org/security-advisories.html"}],"credits":[{"lang":"en","type":"reporter","value":"blakeembrey"},{"lang":"en","type":"remediation developer","value":"mcollina"},{"lang":"en","type":"remediation reviewer","value":"UlisesGascon"},{"lang":"en","type":"remediation reviewer","value":"climba03003"}],"title":"@fastify/static vulnerable to route guard bypass via encoded path separators","metrics":[{"format":"CVSS","cvssV3_1":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:N/A:N","baseScore":5.9,"baseSeverity":"MEDIUM"},"scenarios":[{"lang":"en","value":"GENERAL"}]}],"problemTypes":[{"descriptions":[{"cweId":"CWE-177","lang":"en","description":"CWE-177: Improper Handling of URL Encoding (Hex Encoding)","type":"CWE"}]}],"x_generator":{"engine":"cve-kit 1.0.0"}},"adp":[{"metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-04-16T13:48:04.954479Z","id":"CVE-2026-6414","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"title":"CISA ADP Vulnrichment","providerMetadata":{"orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","shortName":"CISA-ADP","dateUpdated":"2026-04-16T13:48:52.393Z"}}]}}