VulnerabilityAnalyzed

CVE-2026-33732

Prior to version 0.11.13, a 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://`).

MEDIUM 6.5EPSS 0.25%

Does this matter?

Lower severity and a low EPSS score (0.25%). Track it; it rarely justifies an emergency change on its own.

Description

srvx is a universal server based on web standards. Prior to version 0.11.13, a 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://`). Starting in version 0.11.13, the `FastURL` constructor now deopts to native `URL` for any string not starting with `/`, ensuring consistent pathname resolution.

CVSS 3.1: 6.5 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:L/I:L/A:N
EPSS: 0.25% probability · 16th percentile
CISA KEV: Not listed
Weakness: CWE-706
Affected: h3/srvx
Source: security-advisories@github.com

References

https://github.com/h3js/h3/security/advisories/GHSA-p36q-q72m-gchrMitigation, Vendor Advisory
https://github.com/h3js/srvx/commit/de0d69901c357f36a39b7e13eebef6c930652baaPatch
https://github.com/h3js/srvx/releases/tag/v0.11.13Release Notes

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.