CVE-2026-33732: h3 Srvx

Medium severity, CVSS 6.5. EPSS: 0.4% chance of exploitation in the next 30 days.

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.

Affected products

• h3 Srvx: before 0.11.13 (fixed in 0.11.13)

Published 2026-03-26. Last modified 2026-06-17.