VulnerabilityAnalyzed

CVE-2026-44458

Untrusted input in a style object value or property name can therefore inject additional CSS declarations into the rendered style attribute.

MEDIUM 4.3EPSS 0.20%

Does this matter?

Lower severity and a low EPSS score (0.20%). Track it; it rarely justifies an emergency change on its own.

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.

CVSS 3.1: 4.3 MEDIUMCVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:N/I:L/A:N
EPSS: 0.20% probability · 10th percentile
CISA KEV: Not listed
Weakness: CWE-74, CWE-116
Affected: hono/hono
Source: security-advisories@github.com

References

https://github.com/honojs/hono/security/advisories/GHSA-qp7p-654g-cw7pVendor Advisory

Source: NVD record, EPSS from FIRST.org, KEV from CISA. Refreshed daily.