{"id":"CVE-2026-59730","state":"PUBLISHED","title":"@astrojs/node: Backslash-prefixed paths not recognized as internal by trailing-slash redirect","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.","publishedAt":"2026-07-27T20:00:28.662Z","updatedAt":"2026-07-28T13:49:13.730Z","severity":{"score":2.1,"label":"Low","version":"4.0","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","source":"GitHub_M"},"assigner":"GitHub_M","products":["withastro astro"],"affected":[{"vendor":"withastro","product":"astro","versions":[{"version":">= 8.1.0, < 11.0.2","status":"affected"}]}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-r557-wffq-wvrc","https://github.com/withastro/astro/pull/17252","https://github.com/withastro/astro/commit/eb6f97e391ee587747e37609c255c7cd4b9cce3c","https://github.com/withastro/astro/releases/tag/@astrojs/node@11.0.2"],"weaknesses":["CWE-601"],"ingestedAt":"2026-10-29T20:12:32.778Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/59xxx/CVE-2026-59730.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-59730","state":"PUBLISHED","datePublished":"2026-07-27T20:00:28.662Z","dateUpdated":"2026-07-28T13:49:13.730Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-07-06T15:34:16.917Z"},"containers":{"cna":{"title":"@astrojs/node: Backslash-prefixed paths not recognized as internal by trailing-slash redirect","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."}],"affected":[{"vendor":"withastro","product":"astro","versions":[{"version":">= 8.1.0, < 11.0.2","status":"affected"}]}],"references":[{"url":"https://github.com/withastro/astro/security/advisories/GHSA-r557-wffq-wvrc","name":"https://github.com/withastro/astro/security/advisories/GHSA-r557-wffq-wvrc","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/withastro/astro/pull/17252","name":"https://github.com/withastro/astro/pull/17252","tags":["x_refsource_MISC"]},{"url":"https://github.com/withastro/astro/commit/eb6f97e391ee587747e37609c255c7cd4b9cce3c","name":"https://github.com/withastro/astro/commit/eb6f97e391ee587747e37609c255c7cd4b9cce3c","tags":["x_refsource_MISC"]},{"url":"https://github.com/withastro/astro/releases/tag/@astrojs/node@11.0.2","name":"https://github.com/withastro/astro/releases/tag/@astrojs/node@11.0.2","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"HIGH","attackRequirements":"NONE","privilegesRequired":"NONE","userInteraction":"ACTIVE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"NONE","vulnAvailabilityImpact":"NONE","subConfidentialityImpact":"NONE","subIntegrityImpact":"LOW","subAvailabilityImpact":"NONE","baseScore":2.1,"baseSeverity":"LOW","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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-601","lang":"en","description":"CWE-601: URL Redirection to Untrusted Site ('Open Redirect')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-07-27T20:00:28.662Z"},"source":{"advisory":"GHSA-r557-wffq-wvrc","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-07-28T13:48:33.961696Z","id":"CVE-2026-59730","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-07-28T13:49:13.730Z"}}]}}}