{"cve":"CVE-2026-59730","nvd":{"published":"2026-07-27T21:17:05.843","modified":"2026-10-24T13:10:00.147","status":"Deferred","description":"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_v4":{"vector":"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","score":2.1},"cvss_v3":null,"cwes":["CWE-601"],"references":["https://github.com/withastro/astro/commit/eb6f97e391ee587747e37609c255c7cd4b9cce3c","https://github.com/withastro/astro/pull/17252","https://github.com/withastro/astro/releases/tag/@astrojs/node@11.0.2","https://github.com/withastro/astro/security/advisories/GHSA-r557-wffq-wvrc"],"products":[],"source":"nvd","synced_at":"2026-10-24T16:53:27.712498749+00:00"},"epss":{"cve":"CVE-2026-59730","score":0.0046,"percentile":0.3966,"date":"2026-10-26"},"kev":null,"osv":[{"id":"GHSA-r557-wffq-wvrc","url":"https://osv.dev/vulnerability/GHSA-r557-wffq-wvrc","summary":"@astrojs/node: Backslash-prefixed paths not recognized as internal by trailing-slash redirect","modified":"2026-08-12T20:45:07.791392853Z","packages":[{"ecosystem":"npm","name":"@astrojs/node","purl":"pkg:npm/%40astrojs/node","ranges":[">=8.1.0 <11.0.2"],"fixed":["11.0.2"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}