HIGH 8.2 NVD
CVE-2026-86253
h3 (npm package) versions <= 2.0.1-rc.14 contain a path traversal vulnerability in serveStatic(). On Node.js deployments, event.url.pathname is not normalized,
h3 (npm package) versions <= 2.0.1-rc.14 contain a path traversal vulnerability in serveStatic(). On Node.js deployments, event.url.pathname is not normalized, so percent-encoded dot segments (%2e%2e) are passed to decodeURI() and decoded to ../ sequences without sanitization. An unauthenticated remote attacker can send crafted requests to endpoints served by serveStatic() to read arbitrary files outside the intended static directory. Fixed in 1.15.6 and 2.0.1-rc.15.
References
- https://github.com/h3js/h3/security/advisories/GHSA-wr4h-v87w-p3r7
- https://www.vulncheck.com/advisories/h3-before-1.15.6-path-traversal-via-percent-encoded-d
This high severity vulnerability with a CVSS score of 8.2 was published on 2026-09-06 via NVD.
vulnfeed aggregates 10006 vulnerabilities from NVD, CISA KEV,
Ubuntu, Debian, Red Hat, Kubernetes, Exploit-DB, OSS-Security, GitHub and OpenStack — updated every 4 hours.