{"id":"GHSA-wmmm-f939-6g9c","revision":null,"records":[{"revision":"b539a323e4014adca24b03045c13870e","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-39407","aliases":[],"title":"Hono has a middleware bypass via repeated slashes in serveStatic","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes (//) in the request path. When route-based middleware (e.g., /admin/*) is used for authorization, the router may not match paths containing repeated slashes, while serveStatic resolves them as normalized paths. This can lead to a middleware bypass. This vulnerability is fixed in 4.12.12.","state":0,"publishedAt":"2026-04-08T14:41:20.301+00:00","modifiedAt":"2026-04-08T16:04:59.862+00:00","affected":[{"ecosystem":"Vendor product","name":"hono","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"honojs\",\n                    \"product\": \"hono\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.12.12\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-wmmm-f939-6g9c","https://github.com/honojs/hono/commit/9aff14bd727f8b0435c963363fd803260e7b8e3c","https://github.com/honojs/hono/releases/tag/v4.12.12"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-39407","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-39407","identifiers":["CVE-2026-39407"]},"retained":false,"historicalAffected":[]},{"revision":"67805f10007b457894637c611da15ca0","observedAt":"2026-11-14T05:07:15.353+00:00","statement":{"source":"euvd","id":"EUVD-2026-20493","aliases":["CVE-2026-39407","GHSA-wmmm-f939-6g9c"],"title":"Hono is a Web application framework that provides support for any JavaScript runtime. 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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-2026-20493","identifiers":["EUVD-2026-20493","CVE-2026-39407","GHSA-wmmm-f939-6g9c"]},"retained":false,"historicalAffected":[]},{"revision":"b131e4507e5149379718990f4ec5849b","observedAt":"2026-10-25T09:17:18.747+00:00","statement":{"source":"nvd","id":"CVE-2026-39407","aliases":[],"title":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes (//) in the request …","description":"Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.12, a path handling inconsistency in serveStatic allows protected static files to be accessed by using repeated slashes (//) in the request path. When route-based middleware (e.g., /admin/*) is used for authorization, the router may not match paths containing repeated slashes, while serveStatic resolves them as normalized paths. This can lead to a middleware bypass. This vulnerability is fixed in 4.12.12.","state":0,"publishedAt":"2026-04-08T15:16:14.667+00:00","modifiedAt":"2026-07-24T21:10:00.143+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3,"severity":"MEDIUM"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/honojs/hono/commit/9aff14bd727f8b0435c963363fd803260e7b8e3c","https://github.com/honojs/hono/releases/tag/v4.12.12","https://github.com/honojs/hono/security/advisories/GHSA-wmmm-f939-6g9c"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-39407","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-22"],"productCriteria":["cpe:2.3:a:hono:hono:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-04-08T15:16:14.667","lastModified":"2026-07-24T21:10:00.143"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-39407","identifiers":["CVE-2026-39407"]},"retained":false,"historicalAffected":[]},{"revision":"aa0fb42bffa8451cba05865cf16b40ad","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-wmmm-f939-6g9c","aliases":["CVE-2026-39407"],"title":"Hono: Middleware bypass via repeated slashes in serveStatic","description":"## Summary\n\nA path handling inconsistency in `serveStatic` allows protected static files to be accessed by using repeated slashes (`//`) in the request path.\n\nWhen route-based middleware (e.g., `/admin/*`) is used for authorization, the router may not match paths containing repeated slashes, while serveStatic resolves them as normalized paths. This can lead to a middleware bypass.\n\n## Details\n\nThe routing layer and `serveStatic` handle repeated slashes differently.\n\nFor example:\n\n```\n/admin/secret.txt => matches /admin/*\n/admin//secret.txt => may not match /admin/*\n```\n\nHowever, `serveStatic` may interpret both paths as the same file location (e.g., `admin/secret.txt`) and return the file.\n\nThis inconsistency allows a request such as:\n\n```\nGET //admin/secret.txt\n```\n\nto bypass middleware registered on `/admin/*` and access protected files.\n\nThe issue has been fixed by rejecting paths that contain repeated slashes, ensuring consistent behavior between route matching and static file resolution.\n\n## Impact\n\nAn attacker can access static files that are intended to be protected by route-based middleware by using repeated slashes in the request path.\n\nThis can lead to unauthorized access to sensitive files under the static root.\n\nThis issue affects applications that rely on serveStatic together with route-based middleware for access control.","state":0,"publishedAt":"2026-04-08T00:16:45+00:00","modifiedAt":"2026-09-10T03:50:44.7905658+00:00","affected":[{"ecosystem":"npm","name":"hono","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"4.12.12"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:N/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-wmmm-f939-6g9c","https://nvd.nist.gov/vuln/detail/CVE-2026-39407","https://github.com/honojs/hono/commit/9aff14bd727f8b0435c963363fd803260e7b8e3c","https://github.com/honojs/hono","https://github.com/honojs/hono/releases/tag/v4.12.12"],"sourceUrl":"https://github.com/advisories/GHSA-wmmm-f939-6g9c","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-wmmm-f939-6g9c","identifiers":["GHSA-wmmm-f939-6g9c","CVE-2026-39407"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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