CVE-2026-44458

Description

Hono is a Web application framework that provides support for any JavaScript runtime. Prior to 4.12.18, the JSX renderer escapes style attribute object values for HTML but not for CSS. Untrusted input in a style object value or property name can therefore inject additional CSS declarations into the rendered style attribute. The impact is limited to CSS and does not allow JavaScript execution or HTML attribute breakout. This vulnerability is fixed in 4.12.18.

PUBLISHED Reserved 2026-05-06 | Published 2026-05-13 | Updated 2026-05-14 | Assigner GitHub_M

Problem types

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

CWE-116: Improper Encoding or Escaping of Output

Product status

References

github.com/...s/hono/security/advisories/GHSA-qp7p-654g-cw7p

cve.org (CVE-2026-44458)

nvd.nist.gov (CVE-2026-44458)

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