What’s Vulnerable › Vulnerabilities
CVE-2026-44455: Hono: Unvalidated JSX Tag Names in hono/jsx May Allow HTML Injection
- Severity: medium (CVSS 6.1 v3.1)
- Exploited in the wild: not listed in CISA KEV
- EPSS: 0.1% probability of exploitation in the next 30 days
- Public exploit or detection template: none known
- Published: 2026-05-13 · updated 2026-10-26
- Weakness: CWE-74
Description
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
- honojs hono: before 4.12.16 — fixed in 4.12.16
How to fix
Upgrade to a fixed version: honojs hono 4.12.16. Check the vendor advisory for mitigations.
References
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