Exposure of Data Element to Wrong Session Affecting hono package, versions >=3.8.0 <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-18592332
- published8 Aug 2026
- disclosed7 Aug 2026
- creditraster0x2a
Introduced: 7 Aug 2026
NewCVE-2026-71850 (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 Exposure of Data Element to Wrong Session in the memo function. An attacker can access sensitive information belonging to other users by sending requests that trigger the reuse of server-side rendered HTML when components wrapped in memo obtain user- or request-specific data from an ambient context instead of through props. This is only exploitable if the application renders with server-side rendering using hono/jsx, wraps a component reading ambient request state in memo, and both requests reach the same warm instance.