CVE-2026-44455CWE-74

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

Medium · published May 13, 2026

CVSS v3.1
4.7
EPSS
0%
Percentile
11.9
In the wild
Unconfirmed
What it is

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.

The record
Technical detail
CVSS v3.1
4.7 · MEDIUM
Vector
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N
CVSS v4.0
Not supplied
EPSS
0.00221 · 11.9th percentile
Weakness
CWE-74 · Improper Neutralization of Special Elements in Output Used by a Downstream Component ('Injection')
Published
2026-05-13T14:57Z
EPSS history
Timeline
  • 13 MAY 14:57Z
    Hono: Unvalidated JSX Tag Names in hono/jsx May Allow HTML Injection
    cvelistv5