CVE-2026-93981: Honojs Hono

Medium severity, CVSS 4.7. EPSS: 0.2% chance of exploitation in the next 30 days.

hono before 4.13.7 fails to HTML-escape plain strings rendered by hono/jsx as a child or fallback of Suspense, as a string child of ErrorBoundary alongside an asynchronous sibling, as the single child of a Context.Provider, or as the root value passed to renderToString() or renderToReadableStream() from hono/jsx/dom/server. These paths stringify their input and treat the result as already-escaped markup, so an attacker who controls such a string during server-side rendering can inject arbitrary HTML and execute script under the application's origin.

Affected products

• Honojs Hono: before 4.13.7 (fixed in 4.13.7)

Published 2026-09-19. Last modified 2026-09-21.