CVE-2026-59730

CVE-2026-59730 · @astrojs/node: Backslash-prefixed paths not recognized as internal by trailing-slash redirect

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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.

CVSS 2.1 · Faible · EPSS 0,5% · Correctif disponible

Publication

2026-07-27T20:00:28.662Z

Mise à jour

2026-07-28T13:49:13.730Z

Pile logicielle: node

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