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CVE-2026-109955

CVE-2026-109955 · Hono 4.12.4 before 4.13.11 Middleware Bypass via serveStatic Double Decoding

This page contains facts from public vulnerability sources. Check the original advisory before updating.

Hono from 4.12.4 before 4.13.11 contains a middleware bypass vulnerability in serveStatic that allows unauthenticated attackers to skip prefix middleware by exploiting double path decoding. Attackers can send malformed percent-encoded paths that the router matches in encoded form, reaching static files without authentication checks running.

CVSS 6.9 · Medium · EPSS 0.3% · Fix available

Published
Updated

Stack: node

Affected products and versions

  • hono

    Versions
    • ≥ 4.12.4, < 4.13.11: Affected (semver)
    • 4.13.11: Not affected (semver)

    Update to 4.13.11

  • hono npm

    Affected ranges
    • SEMVER: ≥ 4.12.4, < 4.13.11

    Update to 4.13.11

Original sources

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