Medium 4.8Published Mar 26, 2026

CVE-2026-33732srvx is vulnerable to middleware bypass via absolute URI in request line

Updated under an hour ago (Oct 26, 2026, 12:23 AM ET)

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It affects h3js srvx and 1 other product. Add what you run to find out whether that includes you.

No exploitation reported and no EPSS estimate yet.

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Every CVE for h3js srvx

Exploited in the last 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.

CVSS: 4.8 MEDIUM (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:L/I:L/A:N
Weakness (CWE): CWE-706
Known exploited: Not in CISA's KEV catalog
EPSS (exploitation in the next 30 days): Not loaded for this CVE
Assigned by: GitHub_M
NVD analysis: Analyzed
Record last updated: Mar 27, 2026
First seen by InfoSec Signals: Oct 9, 2026

Affected products

Affected products

h3js srvx h3js:srvx (from the name)	before 0.11.13	CNA record
h3 srvx h3:srvx	before 0.11.13	NVD

References

https://github.com/h3js/h3/security/advisories/GHSA-p36q-q72m-gchrx-refsource-confirm, mitigation, vendor-advisory
https://github.com/h3js/srvx/commit/de0d69901c357f36a39b7e13eebef6c930652baax-refsource-misc, patch
https://github.com/h3js/srvx/releases/tag/v0.11.13x-refsource-misc, release-notes

The CVE record on cve.org NVD's entry

The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.