Double Decoding of the Same Data Affecting hono package, versions >=4.12.4 <4.13.11
Threat Intelligence
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Test your applications- Snyk IDSNYK-JS-HONO-20883336
- published13 Oct 2026
- disclosed13 Oct 2026
- creditmanop55555
Introduced: 13 Oct 2026
NewCVE-2026-109955 (opens in a new tab)How to fix?
Upgrade hono to version 4.13.11 or higher.
Overview
hono is an Ultrafast web framework for the Edges
Affected versions of this package are vulnerable to Double Decoding of the Same Data via double URL-decoding in the serveStatic middleware, where a percent-encoded path is decoded a second time after routing. An attacker can supply a request path containing percent-encoded sequences that, after the additional decoding pass, resolve to a path that bypasses access controls, allowing unauthorized read access to protected static files.