{"id":"GHSA-2pvr-wf23-7pc7","revision":null,"records":[{"revision":"9d855a58abd3497f888c3c9be6c925ea","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-54299","aliases":[],"title":"Astro: Host-header full-read SSRF in core prerendered error-page fetch (prerenderedErrorPageFetch default + unvalidated createRequestFromNodeRequest URL)","description":"Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const prerender = true) fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming Host header. When the Host header is not validated against allowedDomains, an attacker can point the fetch at an arbitrary host and read the response. This vulnerability is fixed in 6.4.6.","state":0,"publishedAt":"2026-06-22T17:33:53.235+00:00","modifiedAt":"2026-06-23T15:06:45.902+00:00","affected":[{"ecosystem":"Vendor product","name":"astro","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"withastro\",\n                    \"product\": \"astro\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 6.4.6\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-2pvr-wf23-7pc7"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-54299","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-54299","identifiers":["CVE-2026-54299"]},"retained":false,"historicalAffected":[]},{"revision":"0153454332ee4b1c9bb6f84278e9b6e1","observedAt":"2026-11-07T12:29:13.384+00:00","statement":{"source":"euvd","id":"EUVD-2026-38337","aliases":["CVE-2026-54299","GHSA-2pvr-wf23-7pc7"],"title":"Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const prerender = true) fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from req…","description":"Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const prerender = true) fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming Host header. When the Host header is not validated against allowedDomains, an attacker can point the fetch at an arbitrary host and read the response. This vulnerability is fixed in 6.4.6.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","score":7.5,"severity":null}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-2pvr-wf23-7pc7"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-38337","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 22, 2026, 5:33:53 PM","dateUpdated":"Jun 23, 2026, 3:06:45 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-38337","identifiers":["EUVD-2026-38337","CVE-2026-54299","GHSA-2pvr-wf23-7pc7"]},"retained":false,"historicalAffected":[]},{"revision":"bafa8dd0c68a460e81df202499609a55","observedAt":"2026-10-27T14:13:32.924+00:00","statement":{"source":"nvd","id":"CVE-2026-54299","aliases":[],"title":"Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const prerender = true) fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from req…","description":"Astro is a web framework. Prior to 6.4.6, Astro SSR apps with prerendered error pages (/404 or /500 using export const prerender = true) fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from request.url, which in turn gets its origin from the incoming Host header. When the Host header is not validated against allowedDomains, an attacker can point the fetch at an arbitrary host and read the response. This vulnerability is fixed in 6.4.6.","state":0,"publishedAt":"2026-06-22T19:17:21.26+00:00","modifiedAt":"2026-10-25T23:10:00.167+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","score":7.5,"severity":"HIGH"},{"system":"CVSS 3.1 · nvd@nist.gov · Primary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N","score":7.5,"severity":"HIGH"}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-2pvr-wf23-7pc7"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-54299","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Analyzed","weaknesses":["CWE-20","CWE-918"],"productCriteria":["cpe:2.3:a:astro:astro:*:*:*:*:*:node.js:*:*"],"sourceDates":{"published":"2026-06-22T19:17:21.260","lastModified":"2026-10-25T23:10:00.167"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-54299","identifiers":["CVE-2026-54299"]},"retained":false,"historicalAffected":[]},{"revision":"17c794b977f94176b2d541b33d291007","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-2pvr-wf23-7pc7","aliases":["CVE-2026-54299"],"title":"Astro: Host header SSRF in prerendered error page fetch","description":"## Summary\n\nAstro SSR apps with prerendered error pages (`/404` or `/500` using `export const prerender = true`) fetch those pages over HTTP at runtime when an error occurs. The URL for this fetch is derived from `request.url`, which in turn gets its origin from the incoming `Host` header. When the `Host` header is not validated against `allowedDomains`, an attacker can point the fetch at an arbitrary host and read the response.\n\n## Who is affected\n\nThis affects SSR deployments that:\n\n1. Have a prerendered 404 or 500 page\n2. Use `createRequestFromNodeRequest` from `astro/app/node` with `app.render()` **without** overriding `prerenderedErrorPageFetch` — this includes custom servers built on the public API and third-party adapters\n\n**Not affected:**\n- `@astrojs/node` >= 9.5.4 (reads error pages from disk)\n- `@astrojs/cloudflare` (uses the ASSETS binding)\n- The dev server (renders error pages in-process)\n\n## How it works\n\n`createRequestFromNodeRequest` builds `request.url` from the raw `Host` / `:authority` header. The `allowedDomains` option is accepted but only gates `X-Forwarded-For` — it does not constrain the URL origin. (The public `createRequest` does fall back to `localhost` for unvalidated hosts; this internal builder did not.)\n\nWhen `app.render()` encounters a 404 or 500 with a prerendered error route, `default-handler.ts` constructs the error page URL using the origin from `request.url` and fetches it via `prerenderedErrorPageFetch`, which defaults to global `fetch`. The response body is served to the client.\n\nAn attacker sends a request with `Host: attacker-host:port`, triggers an error (e.g., requesting a nonexistent path for a 404), and receives the response from the attacker-controlled host reflected back.\n\n## Remediation\n\nThe error page fetch origin is now validated against `allowedDomains` before use. When the host is validated, the original origin is preserved. Otherwise, it falls back to `localhost`. The fetch is also wrapped in a try/catch so that connection failures degrade gracefully to a plain error response.\n\n## Credit\n\n5ud0 / Tarmo Technologies","state":0,"publishedAt":"2026-06-16T14:38:06+00:00","modifiedAt":"2026-08-12T20:45:07.7876781+00:00","affected":[{"ecosystem":"npm","name":"astro","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"6.4.6"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:C/C:H/I:L/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/withastro/astro/security/advisories/GHSA-2pvr-wf23-7pc7","https://nvd.nist.gov/vuln/detail/CVE-2026-54299","https://github.com/withastro/astro"],"sourceUrl":"https://github.com/advisories/GHSA-2pvr-wf23-7pc7","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-2pvr-wf23-7pc7","identifiers":["GHSA-2pvr-wf23-7pc7","CVE-2026-54299"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-c91a0736a9624a48aebf081ca5dd86b2","complete":true,"records":13633,"lastAttemptAt":"2026-11-07T22:04:27.1191985+00:00","lastSuccessAt":"2026-11-07T22:04:27.115+00:00","error":null,"lastVerifiedAt":"2026-11-07T22:04:27.115+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13685,"expectedIdentifiers":13685,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. 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