HTTP Request Smuggling Affecting hono package, versions >=4.7.0 <4.12.34
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-18592333
- published8 Aug 2026
- disclosed7 Aug 2026
- creditmorgan-coded
Introduced: 7 Aug 2026
NewCVE-2026-71849 (opens in a new tab)How to fix?
Upgrade hono to version 4.12.34 or higher.
Overview
hono is an Ultrafast web framework for the Edges
Affected versions of this package are vulnerable to HTTP Request Smuggling in the proxy process. An attacker can access connection-scoped or internal metadata by sending requests to an application that proxies responses from an origin specifying custom headers in the Connection response header. This is only exploitable if the origin server includes additional, non-standard headers in the Connection response header beyond the standard hop-by-hop headers.