{"id":"EUVD-2026-36576","revision":"4ca06d3d394f4e538dcbcde20953f6e2","records":[{"revision":"4ca06d3d394f4e538dcbcde20953f6e2","observedAt":"2026-11-03T10:07:16.348+00:00","statement":{"source":"euvd","id":"EUVD-2026-36576","aliases":["CVE-2026-53607","GHSA-34pj-2622-jvxq"],"title":"ApostropheCMS is an open-source Node.js content management system. In versions up to and including 4.30.0, when `prettyUrls: true` is enabled on `@apostrophecms/file` (a documented SEO feature for serving uploaded files at clean URLs), the …","description":"ApostropheCMS is an open-source Node.js content management system. In versions up to and including 4.30.0, when `prettyUrls: true` is enabled on `@apostrophecms/file` (a documented SEO feature for serving uploaded files at clean URLs), the public pretty-URL handler builds the upstream URL using the raw `Host` HTTP request header. That URL is then `fetch`'ed and the response body + headers are streamed straight back to the requester. Because `Host` is fully attacker-controlled, an unauthenticated remote attacker can pivot the apostrophe process to issue outbound HTTP requests against any host it can reach on the private network. The path component is constrained to `/uploads/attachments/<cuid>-<slug>.<ext>` (built from a local-DB lookup), which keeps the impact narrow: cross-instance data exfiltration is neutralized by cuid uniqueness, but blind-SSRF residuals remain (network-topology mapping via response-code / timing differences and verbose proxy/WAF 404 body disclosure). As of time of publication, no known patched versions exist.","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:U/C:L/I:N/A:N","score":3.7,"severity":null}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-34pj-2622-jvxq"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-36576","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Jun 12, 2026, 8:54:30 PM","dateUpdated":"Jun 15, 2026, 6:35:34 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-2026-36576","identifiers":["EUVD-2026-36576","CVE-2026-53607","GHSA-34pj-2622-jvxq"]},"retained":false,"historicalAffected":[]}],"coverage":[]}