{"id":"CVE-2026-63670","sourceIdentifier":"security-advisories@github.com","published":"2026-08-17T20:16:45.000","lastModified":"2026-10-23T16:10:00.313","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"ApostropheCMS is an open-source Node.js content management system. Prior to 2.17.6, sanitizeHtml() can pass disallowed executable markup through packages/sanitize-html/index.js when textarea or xmp is included in allowedTags because a literal solidus after the raw-text end-tag name is treated as text by htmlparser2 and the ontext handler emits that content without escaping, while a browser parses the following img onerror markup as active HTML. This issue is fixed in version 2.17.6."},{"lang":"es","value":"ApostropheCMS es un sistema de gestión de contenido de código abierto basado en Node.js. Antes de la 2.17.6, sanitizeHtml() puede permitir el paso de marcado ejecutable no permitido a través de packages/sanitize-html/index.js cuando textarea o xmp están incluidos en allowedTags porque una barra sólida literal después del nombre de la etiqueta de cierre de texto sin formato es tratada como texto por htmlparser2 y el gestor ontext emite ese contenido sin escapar, mientras que un navegador analiza el siguiente marcado img onerror como HTML activo. Este problema se ha solucionado en la versión 2.17.6."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"apostrophecms","product":"apostrophe","versions":[{"version":"< 2.17.6","status":"affected"}]}]}],"metrics":{"cvssMetricV31":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"3.1","vectorString":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","baseScore":6.1,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"REQUIRED","scope":"CHANGED","confidentialityImpact":"LOW","integrityImpact":"LOW","availabilityImpact":"NONE"},"exploitabilityScore":2.8,"impactScore":2.7}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-08-18T18:07:52.564054Z","id":"CVE-2026-63670","options":[{"exploitation":"poc"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-79"}]}],"references":[{"url":"https://github.com/apostrophecms/apostrophe/commit/eae1fb2b72ec5d1c27d0977509c6482a0408f725","source":"security-advisories@github.com"},{"url":"https://github.com/apostrophecms/apostrophe/pull/5501","source":"security-advisories@github.com"},{"url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw","source":"security-advisories@github.com"},{"url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-jxwj-j7wr-gfrw","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}