Detections
Analytics

SCA: security update for h3 (GHSA-3vj8-jmxq-cgj5)

critical Tenable Cloud Security Plugin ID 438946

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - H3 is a minimal H(TTP) framework. Versions 2.0.0-0 through 2.0.1-rc.14 contain a Host header spoofing
 vulnerability in the NodeRequestUrl (which extends FastURL) which allows middleware bypass. When
 event.url, event.url.hostname, or event.url._url is accessed, such as in a logging middleware, the _url
 getter constructs a URL from untrusted data, including the user-controlled Host header. Because H3's
 router resolves the route handler before middleware runs, an attacker can supply a crafted Host header
 (e.g., Host: localhost:3000/abchehe?) to make the middleware path check fail while the route handler still
 matches, effectively bypassing authentication or authorization middleware. This affects any application
 built on H3 (including Nitro/Nuxt) that accesses event.url properties in middleware guarding sensitive
 routes. The issue requires an immediate fix to prevent FastURL.href from being constructed with
 unsanitized, attacker-controlled input. Version 2.0.1-rc.15 contains a patch for this issue.
 (CVE-2026-33131)

Solution

Update the h3 library and its related packages to version 2.0.1-rc.15 or later.

See Also

https://github.com/advisories/GHSA-3vj8-jmxq-cgj5

Plugin Details

Severity: Critical

ID: 438946

Version: Revision 1.8

Type: Local

Family: SCA Checks

Published: 3/18/2026

Updated: 7/2/2026

Supported Sensors: Tenable Cloud Security, Tenable Self-Hosted Container Security

Risk Information

VPR

Risk Factor: Medium

Score: 4.3

Percentile: 53.59

Vendor

Vendor Severity: High

CVSS v2

Risk Factor: High

Base Score: 9.4

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:N

CVSS Score Source: CVE-2026-33131

CVSS v3

Risk Factor: Critical

Base Score: 9.1

Temporal Score: 8.2

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N

Temporal Vector: CVSS:3.0/E:P/RL:O/RC:C

Vulnerability Information

Exploit Available: true

Exploit Ease: Exploits are available

Patch Publication Date: 3/18/2026

Vulnerability Publication Date: 3/18/2026

Reference Information

CVE: CVE-2026-33131

cwe: CWE-290