CVE-2026-33732

low-risk
Published 2026-03-26

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.

Do I need to act?

-
0.04% chance of exploitation
EPSS score — low exploit probability
-
Not on CISA KEV list
No confirmed active exploitation reported to CISA
?
Patch status unknown
Check vendor advisories for fix availability and mitigation guidance
4
CVSS 4.8/10 Medium
NETWORK / HIGH complexity

Affected Products (1)

Srvx

Affected Vendors

H3

References (3)

Mitigation https://github.com/h3js/h3/security/advisories/GHSA-p36q-q72m-gchr
Patch https://github.com/h3js/srvx/commit/de0d69901c357f36a39b7e13eebef6c930652baa
Release Notes https://github.com/h3js/srvx/releases/tag/v0.11.13
20
/ 100
low-risk
Severity 15/34 · Moderate
Exploitability 0/34 · Minimal
Exposure 5/34 · Minimal