{"id":"CVE-2026-44646","sourceIdentifier":"security-advisories@github.com","published":"2026-06-17T23:17:03.743","lastModified":"2026-10-26T11:10:00.157","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"LiquidJS is a Shopify/GitHub Pages compatible template engine written in pure JavaScript. In versions 10.25.7 and below, Context.spawn() creates a child Context for the {% render %} tag but does not propagate the parent context's resolved ownPropertyOnly value, resulting in a silent bypass. The new context re-derives ownPropertyOnly from opts.ownPropertyOnly (the instance-level option), silently discarding any RenderOptions.ownPropertyOnly override that was supplied to parseAndRender(). As a result, a developer who runs a Liquid instance with the backwards-compatible ownPropertyOnly:false and then locks down an untrusted render with parseAndRender(..., { ownPropertyOnly: true }) still leaks prototype-chain properties from inside any {% render %} partial. This is a distinct exploit surface from the previously identified array-filter variants (where, reject, group_by, find, find_index, has) — the underlying root cause in Context.spawn() is shared, but {% render %} is a separately reachable sink that needs no filter usage. This issue has been fixed in version 10.26.0."},{"lang":"es","value":"LiquidJS es un motor de plantillas compatible con Shopify/GitHub Pages escrito en JavaScript puro. En las versiones 10.25.7 e inferiores, Context.spawn() crea un Context hijo para la etiqueta {% render %} pero no propaga el valor ownPropertyOnly resuelto del contexto padre, lo que resulta en un bypass silencioso. El nuevo contexto vuelve a derivar ownPropertyOnly de opts.ownPropertyOnly (la opción a nivel de instancia), descartando silenciosamente cualquier anulación de RenderOptions.ownPropertyOnly que se haya proporcionado a parseAndRender(). Como resultado, un desarrollador que ejecuta una instancia de Liquid con la opción ownPropertyOnly:false compatible con versiones anteriores y luego restringe una renderización no confiable con parseAndRender(..., { ownPropertyOnly: true }) aún filtra propiedades de la cadena de prototipos desde dentro de cualquier parcial {% render %}. Esta es una superficie de exploit distinta de las variantes de filtro de array identificadas previamente (where, reject, group_by, find, find_index, has) - la causa raíz subyacente en Context.spawn() es compartida, pero {% render %} es un sumidero alcanzable por separado que no necesita el uso de filtros. Este problema ha sido solucionado en la versión 10.26.0."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"harttle","product":"liquidjs","versions":[{"version":"< 10.26.0","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:N/S:U/C:L/I:N/A:N","baseScore":5.3,"baseSeverity":"MEDIUM","attackVector":"NETWORK","attackComplexity":"LOW","privilegesRequired":"NONE","userInteraction":"NONE","scope":"UNCHANGED","confidentialityImpact":"LOW","integrityImpact":"NONE","availabilityImpact":"NONE"},"exploitabilityScore":3.9,"impactScore":1.4}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-06-18T13:45:29.819664Z","id":"CVE-2026-44646","options":[{"exploitation":"poc"},{"automatable":"yes"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-693"}]}],"references":[{"url":"https://github.com/harttle/liquidjs/commit/dbbf6288030591bf6da28d8c1cce5a17bca97bb6","source":"security-advisories@github.com"},{"url":"https://github.com/harttle/liquidjs/releases/tag/v10.26.0","source":"security-advisories@github.com"},{"url":"https://github.com/harttle/liquidjs/security/advisories/GHSA-9x9p-qf8f-mvjg","source":"security-advisories@github.com"},{"url":"https://github.com/harttle/liquidjs/security/advisories/GHSA-9x9p-qf8f-mvjg","source":"134c704f-9b21-4f2e-91b3-4a467353bcc0"}]}