AUGUST 16, 2026
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Case File

CVE-2026-71850

MEDIUM · CVSS 4.8 EPSS 0.16% Public Exploit

Source: NVD + CISA KEV + EPSS · Published 2026-08-07 · Last synced 2026-08-16

CyberRota Analysis

AI-Generated

The Hono web application framework for JavaScript runtimes is vulnerable due to its memoization function, which improperly retains and reuses server-side rendered HTML across different user requests. This flaw can lead to unauthorized disclosure of sensitive information, including user account details and request-scoped secrets, when multiple users access the same memoized component. Organizations using affected versions (3.8.0 to 4.12.33) should prioritize upgrading to version 4.12.34 to mitigate potential data exposure risks.

Public Exploit Signal

A public exploit, PoC, GitHub repository or Metasploit reference was detected for this CVE.

GitHub PoC Links

Note: these links are listed for security research and verification purposes only.

CVE
CVE-2026-71850
Severity
MEDIUM
CVSS
4.8
EPSS
0.16%
Java

Original NVD Description

Hono is a Web application framework that provides support for any JavaScript runtime. From 3.8.0 to 4.12.33, memo() from hono/jsx retains the result of a server side render and reuses it for later renders with comparator equal props, and request scoped values read inside the component take no part in that comparison, so a response can contain HTML rendered for another user's request. Components wrapped with memo() are compared by props alone; values read implicitly during rendering, such as JSX Context through createContext() and useContext(), useRequestContext() from hono/jsx-renderer, and getContext() from hono/context-storage, do not participate, and the retained result lives as long as the wrapped component, so it outlives the request that produced it. A user may receive a response containing HTML rendered for another user when both render the same memoized component with comparator equal props on the same warm instance, which may disclose another user's account or profile data, disclose request scoped secrets embedded in HTML such as CSRF tokens, or expose role specific content to users who should not receive it. This issue is fixed in version 4.12.34.