{"id":"CVE-2026-53607","revision":"5a3c6d29359d40c4889c48e9b718c37d","records":[{"revision":"5a3c6d29359d40c4889c48e9b718c37d","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-53607","aliases":[],"title":"@apostrophecms/file pretty-URL Vulnerable to Unauthenticated SSRF via Host header","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":"2026-06-12T20:54:30.866+00:00","modifiedAt":"2026-06-15T18:35:34.721+00:00","affected":[{"ecosystem":"Vendor product","name":"apostrophe","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"apostrophecms\",\n                    \"product\": \"apostrophe\",\n                    \"versions\": [\n                        {\n                            \"version\": \"<= 4.30.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"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":"LOW"}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-34pj-2622-jvxq"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-53607","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-53607","identifiers":["CVE-2026-53607"]},"retained":false,"historicalAffected":[]}],"coverage":[]}