{"affected":[{"product":"hono","source":"CNA: GitHub_M","vendor":"honojs","versions":[{"status":"affected","version":">= 3.12.0, < 4.13.16"}]}],"cveId":"CVE-2026-126359","cwes":["CWE-79"],"description":"Hono is a Web application framework that provides support for any JavaScript runtime. From 3.12.0 until 4.13.16, the css helper in hono/css escapes interpolated string values separately and therefore fails to neutralize a closing style tag when &lt; ends the template text or a preceding value and / begins the next attacker-controlled value. During server-side rendering, the combined output can close the &lt;Style /&gt; element early and cause the remainder of the interpolated value to be interpreted as HTML. Applications that place an untrusted string immediately after &lt; in a css template, including adjacent untrusted interpolations, can expose viewers to attacker-controlled HTML or script and information accessible to that page. Other uses of the css helper are not affected. This issue is fixed in version 4.13.16.","epss":null,"exploits":[],"kev":null,"metrics":[{"score":3.4,"severity":"low","source":"CNA: GitHub_M","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:N/A:N","version":"3.1"}],"modifiedAt":1794522152161,"publishedAt":1794522152161,"references":[{"source":"CNA: GitHub_M","tags":["x_refsource_CONFIRM"],"url":"https://github.com/honojs/hono/security/advisories/GHSA-3gg2-335m-rxc6"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/honojs/hono/commit/15bbd96ad1b62a0b189db4fd8dc7bf8ef280c513"},{"source":"CNA: GitHub_M","tags":["x_refsource_MISC"],"url":"https://github.com/honojs/hono/releases/tag/v4.13.16"}],"remediation":[],"revision":"eedae90ba9fde8a253b7735168eeab7ecbd2296a8da25ddd6a9d007c64f707d8","sources":[{"modifiedAt":1794522152161,"name":"CNA: GitHub_M","retrievedAt":1794524925681,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126359"}],"ssvc":null,"status":"published","title":"Hono: `css` helper does not escape a closing tag split between the template and an interpolated value, allowing HTML injection","updatedAt":1794524925681}