{"id":"GHSA-p36q-q72m-gchr","summary":"srvx is vulnerable to middleware bypass via absolute URI in request line ","details":"## Summary\n\nA pathname parsing discrepancy in srvx's `FastURL` allows middleware bypass on the Node.js adapter when a raw HTTP request uses an absolute URI with a non-standard scheme (e.g. `file://`).\n\n## Details\n\nWhen Node.js receives an absolute URI in the request line (e.g. `GET file://hehe?/internal/run HTTP/1.1`), `req.url` is set verbatim to `file://hehe?/internal/run`. Since this doesn't start with `/`, `NodeRequestURL` passes it directly to `FastURL` as a string, which stores it in `#href` for lazy manual parsing.\n\n`FastURL#getPos()` locates the pathname by finding `://` then scanning for the next `/` — but this fails for URLs like `file://hehe?/internal/run` where a `?` appears before the first `/` after the authority. The manual parser extracts pathname as `/internal/run`, while native `URL` correctly parses it as pathname `/` with search `?/internal/run`.\n\nThis discrepancy means the router (using the fast-path) matches `/internal/run`, but if any middleware triggers a deopt to native `URL` (e.g. by accessing `hostname`), subsequent middleware sees a different pathname — bypassing route-based middleware guards.\n\nThis is a bypass of [CVE-2026-33131](https://github.com/h3js/h3/security/advisories/GHSA-3vj8-jmxq-cgj5).\n\n## Impact\n\nRoute-based middleware (auth guards, rate limiters, etc.) can be bypassed on the Node.js adapter when a prior middleware triggers `FastURL` deopt. Requires sending a raw HTTP request (not possible from browsers).\n\n## Fix\n\nsrvx `FastURL` constructor now deopts to native `URL` for any string not starting with `/`, ensuring consistent pathname resolution.","aliases":["CVE-2026-33732"],"modified":"2026-03-27T21:20:00.752426Z","published":"2026-03-26T16:52:08Z","database_specific":{"cwe_ids":["CWE-706"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-03-26T16:52:08Z","nvd_published_at":"2026-03-26T18:16:31Z"},"references":[{"type":"WEB","url":"https://github.com/h3js/h3/security/advisories/GHSA-p36q-q72m-gchr"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-33732"},{"type":"WEB","url":"https://github.com/h3js/srvx/commit/de0d69901c357f36a39b7e13eebef6c930652baa"},{"type":"PACKAGE","url":"https://github.com/h3js/srvx"},{"type":"WEB","url":"https://github.com/h3js/srvx/releases/tag/v0.11.13"}],"affected":[{"package":{"name":"srvx","ecosystem":"npm","purl":"pkg:npm/srvx"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"0.11.13"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/03/GHSA-p36q-q72m-gchr/GHSA-p36q-q72m-gchr.json"}}],"schema_version":"1.9.0","severity":[{"type":"CVSS_V3","score":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N"}]}