{"id":"EUVD-2026-42327","revision":"3b65fba8dd54434b812248aa22e2afe5","records":[{"revision":"3b65fba8dd54434b812248aa22e2afe5","observedAt":"2026-10-28T08:38:19.55+00:00","statement":{"source":"euvd","id":"EUVD-2026-42327","aliases":["CVE-2026-59895","GHSA-w62v-xxxg-mg59"],"title":"Hono is a Web application framework that provides support for any JavaScript runtime. From 4.0.0 before 4.12.27, cx() in hono/css composes class names from plain strings but marks the result as already escaped without HTML-escaping the inpu…","description":"Hono is a Web application framework that provides support for any JavaScript runtime. From 4.0.0 before 4.12.27, cx() in hono/css composes class names from plain strings but marks the result as already escaped without HTML-escaping the input, allowing untrusted className values used in a JSX class attribute during server-side rendering to break out of the attribute and inject arbitrary markup. This issue is fixed in version 4.12.27.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1,"severity":null}],"references":["https://github.com/honojs/hono/security/advisories/GHSA-w62v-xxxg-mg59","https://github.com/honojs/hono/commit/cd3f6f7194f0e5c9d4b26ae0cf232018d0f388fc","https://github.com/honojs/hono/releases/tag/v4.12.27"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-42327","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jul 8, 2026, 4:09:51 PM","dateUpdated":"Jul 8, 2026, 7:41:04 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-42327","identifiers":["EUVD-2026-42327","CVE-2026-59895","GHSA-w62v-xxxg-mg59"]},"retained":false,"historicalAffected":[]}],"coverage":[]}