CVE-2026-33732

srvx is vulnerable to middleware bypass via absolute URI in request line

MEDIUM
6.5
CVSS Score
Published: March 26, 2026 at 05:21 PM UTC
Updated: June 17, 2026 at 10:38 AM UTC
2 products affected across 2 vendorsSrvxSrvx

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Severity
MEDIUM6.5
Exploit prediction
EPSS 0.3%
SSVC
No known exploit

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.

Affected

Our own answer: ranges merged, affected separated from platform-only, with confidence and review flags.

95%
v < 0.11.13
v < 0.11.13
Affected range stops below 0.11.13, so it looks safe — our inference, not a vendor statement

Remediation

No guide yet

No remediation guidance has been written for this CVE yet. What the record does show:

References (3)

x_refsource_CONFIRMMitigationVendor Advisory
Source: cverecord
https://github.com/h3js/h3/security/advisories/GHSA-p36q-q72m-gchr
x_refsource_MISCRelease Notes
Source: cverecord
https://github.com/h3js/srvx/releases/tag/v0.11.13

SSVC — Action Prioritization

SSVCNo known exploitNot automatablePartial impact

SSVC signals action urgency (what to patch first), separate from CVSS which measures severity.

CVSS

Attack Vector
NETWORK
Complexity
LOW
Privileges
NONE
User Interaction
NONE
Scope
UNCHANGED
Confidentiality
LOW
Integrity
LOW
Availability
NONE
Vector?

Quick Info

StatusANALYZED
CWE
CWE-706

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