p PatchFirst

CVE-2026-86251

CVE-2026-86251 · h3 before 1.15.9 Path Traversal via Double Decoding

Esta página presenta datos de fuentes públicas de vulnerabilidades. Consulta el aviso original antes de actualizar.

h3 versions before 1.15.9 contain a path traversal vulnerability in the serveStatic utility. A double-decoding flaw allows a request path containing double-encoded dot sequences (e.g. %252e%252e) to be decoded to %2e%2e, which survives resolveDotSegments() because that function only checks for literal '.' characters. When the resulting asset ID is resolved by URL-based backends (CDN, S3, object storage), %2e%2e is interpreted as '..' per RFC 3986, enabling path traversal to read arbitrary files from the backend.

CVSS 8.2 · Alta · EPSS 0,4% · Corrección disponible

Publicación
Actualización

Pila tecnológica: node

Productos y versiones afectados

  • h3

    Versiones
    • ≥ 0, < 1.15.9: Afectada (semver)
    • 1.15.9: No afectada (semver)

    Actualiza a 1.15.9

  • h3 npm

    Intervalos de versiones afectados
    • SEMVER: < 1.15.9

    Actualiza a 1.15.9

Fuentes originales

Comprueba tu servidor →