Vulnerability Description
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.
CVSS Score
MEDIUM
Related Weaknesses (CWE)
References
- https://github.com/honojs/hono/security/advisories/GHSA-hxh3-vqpv-xpqv
- https://www.vulncheck.com/advisories/hono-jsx-before-4.13.7-cross-site-scripting
FAQ
What is CVE-2026-93981?
CVE-2026-93981 is a vulnerability with a CVSS score of 4.7 (MEDIUM). 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...
How severe is CVE-2026-93981?
CVE-2026-93981 has been rated MEDIUM with a CVSS base score of 4.7/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-93981?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.