{"id":"CVE-2026-59730","sourceIdentifier":"security-advisories@github.com","published":"2026-07-27T21:17:05.843","lastModified":"2026-10-24T13:10:00.147","vulnStatus":"Deferred","cveTags":[],"descriptions":[{"lang":"en","value":"Astro is a web framework for content-driven websites. In versions 8.1.0 through 11.0.1, when trailingSlash: 'always' is configured, the @astrojs/node standalone server's static file handler appends a trailing slash to request paths and issues a 301 redirect. Paths beginning with /\\ (slash-backslash) were not recognized as internal paths, so the handler would echo the raw path back in the Location header. Because browsers treat \\ as / per the WHATWG URL specification, the resulting redirect could resolve to an external host. Preconditions for exploitation: trailingSlash: 'always' must be set (non-default; the default is 'ignore'), the request path must not have a file extension in its final segment, and an attacker must deliver the crafted link to a user. This issue has been fixed in version 11.0.2."},{"lang":"es","value":"Astro es un framework web para sitios web basados en contenido. En las versiones 8.1.0 a 11.0.1, cuando trailingSlash: ’always’ está configurado, el gestor de archivos estáticos del servidor independiente @astrojs/node añade una barra final a las rutas de solicitud y emite una redirección 301. Las rutas que comienzan con /\\ (barra-barra invertida) no eran reconocidas como rutas internas, por lo que el gestor devolvía la ruta original en el encabezado Location. Debido a que los navegadores tratan \\ como / según la especificación de URL de WHATWG, la redirección resultante podría resolverse en un host externo. Precondiciones para la explotación: trailingSlash: ’always’ debe estar configurado (no es el valor predeterminado; el valor predeterminado es ’ignore’), la ruta de solicitud no debe tener una extensión de archivo en su segmento final, y un atacante debe entregar el enlace manipulado a un usuario. Este problema ha sido solucionado en la versión 11.0.2."}],"affected":[{"source":"security-advisories@github.com","affectedData":[{"vendor":"withastro","product":"astro","versions":[{"version":">= 8.1.0, < 11.0.2","status":"affected"}]}]}],"metrics":{"cvssMetricV40":[{"source":"security-advisories@github.com","type":"Secondary","cvssData":{"version":"4.0","vectorString":"CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:A/VC:N/VI:N/VA:N/SC:N/SI:L/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","baseScore":2.1,"baseSeverity":"LOW","attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","exploitMaturity":"NOT_DEFINED","confidentialityRequirement":"NOT_DEFINED","integrityRequirement":"NOT_DEFINED","availabilityRequirement":"NOT_DEFINED","modifiedAttackVector":"NOT_DEFINED","modifiedAttackComplexity":"NOT_DEFINED","modifiedAttackRequirements":"NOT_DEFINED","modifiedPrivilegesRequired":"NOT_DEFINED","modifiedUserInteraction":"NOT_DEFINED","modifiedVulnConfidentialityImpact":"NOT_DEFINED","modifiedVulnIntegrityImpact":"NOT_DEFINED","modifiedVulnAvailabilityImpact":"NOT_DEFINED","modifiedSubConfidentialityImpact":"NOT_DEFINED","modifiedSubIntegrityImpact":"NOT_DEFINED","modifiedSubAvailabilityImpact":"NOT_DEFINED","Safety":"NOT_DEFINED","Automatable":"NOT_DEFINED","Recovery":"NOT_DEFINED","valueDensity":"NOT_DEFINED","vulnerabilityResponseEffort":"NOT_DEFINED","providerUrgency":"NOT_DEFINED"}}],"ssvcV203":[{"source":"134c704f-9b21-4f2e-91b3-4a467353bcc0","ssvcData":{"timestamp":"2026-07-28T13:48:33.961696Z","id":"CVE-2026-59730","options":[{"exploitation":"none"},{"automatable":"no"},{"technicalImpact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}]},"weaknesses":[{"source":"security-advisories@github.com","type":"Secondary","description":[{"lang":"en","value":"CWE-601"}]}],"references":[{"url":"https://github.com/withastro/astro/commit/eb6f97e391ee587747e37609c255c7cd4b9cce3c","source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/pull/17252","source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/releases/tag/@astrojs/node@11.0.2","source":"security-advisories@github.com"},{"url":"https://github.com/withastro/astro/security/advisories/GHSA-r557-wffq-wvrc","source":"security-advisories@github.com"}]}