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Medium · 4.7 CVE-2026-44455 EUVD-2026-30034GHSA-69xw-7hcm-h432

Hono: Unvalidated JSX Tag Names in hono/jsx May Allow HTML Injection

Published May 13, 2026 · Updated May 14, 2026 · Assigned by GitHub_M

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

VendorProductAffectedFixed
honojs hono < 4.12.16 —

Affected packages

EcosystemPackageAffectedFixedRecord
npm hono < 4.12.16 4.12.16 GHSA-69xw-7hcm-h432

References