CVE-2026-44455

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

State: Published
Severity: 4.7 Medium
Published: May 13, 2026
Updated: May 14, 2026
Reserved: May 6, 2026

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.

Scores

CVSS	Score	Vector	Source
3.1	4.7 Medium	CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N	GitHub_M

Weaknesses

CWE-74 Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')

Affected Products

Product	Versions
honohonojs	< 4.12.16Affected

References

https://github.com/honojs/hono/security/advisories/GHSA-69xw-7hcm-h432

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