Improperly Implemented Security Check for Standard Affecting hono package, versions <4.12.25
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-17356391
- published17 Jun 2026
- disclosed16 Jun 2026
- creditRootingg
Introduced: 16 Jun 2026
NewCVE-2026-54289 (opens in a new tab)How to fix?
Upgrade hono to version 4.12.25 or higher.
Overview
hono is an Ultrafast web framework for the Edges
Affected versions of this package are vulnerable to Improperly Implemented Security Check for Standard in the Lambda@Edge adapter that truncates repeated request headers. An attacker can bypass access restrictions or affect auditing mechanisms by sending repeated request headers, causing only the last value to be processed and earlier values to be ignored.