Use of Incorrectly-Resolved Name or Reference Affecting h3 package, versions >=2.0.1-rc.1 <2.0.1-rc.17
Threat Intelligence
Exploit Maturity
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
Proof of Concept
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Test your applications- Snyk IDSNYK-JS-H3-15745916
- published22 Mar 2026
- disclosed20 Mar 2026
- creditrestriction
Introduced: 20 Mar 2026
NewCVE-2026-33490 (opens in a new tab)Common Vulnerabilities and Exposures (CVE) are common identifiers for publicly known security vulnerabilities
Common Weakness Enumeration (CWE) is a category system for software weaknesses
How to fix?
Upgrade h3 to version 2.0.1-rc.17 or higher.
Overview
h3 is a Minimal H(TTP) framework built for high performance and portability.
Affected versions of this package are vulnerable to Use of Incorrectly-Resolved Name or Reference via the mount method. An attacker can manipulate request context and set unintended privilege flags by crafting requests to routes that share a string prefix with a mounted sub-application, causing middleware to execute on unrelated paths.