Asymmetric Resource Consumption (Amplification) Affecting hono package, versions <4.13.5
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-19499093
- published2 Sept 2026
- disclosed1 Sept 2026
- creditRikuxx0
Introduced: 1 Sep 2026
NewCVE-2026-84364 (opens in a new tab)How to fix?
Upgrade hono to version 4.13.5 or higher.
Overview
hono is an Ultrafast web framework for the Edges
Affected versions of this package are vulnerable to Asymmetric Resource Consumption (Amplification) in the parseBody() function, which expands dot-separated form field names into nested objects without limiting nesting depth or total object creation. An attacker can exhaust the JavaScript heap and terminate the server process by sending concurrent requests with deeply dotted field names, since a body within the normal size limit allocates an object graph far larger than the request itself. This requires the endpoint to have dot-notation parsing enabled, which is off by default.