CVE-2026-44455: Hono

Medium severity, CVSS 6.1. EPSS: 0.2% chance of exploitation in the next 30 days.

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.16, Improper handling of JSX element tag names in hono/jsx allowed unvalidated tag names to be directly inserted into the generated HTML output. When untrusted input is used as a tag name via the programmatic jsx() or createElement() APIs during server-side rendering, specially crafted values may break out of the intended element context and inject unintended HTML. This vulnerability is fixed in 4.12.16.

Affected products

• Hono Hono: before 4.12.16 (fixed in 4.12.16)

Published 2026-05-13. Last modified 2026-06-17.