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This issue is fixed in ApostropheCMS Form 1.5.5.","state":0,"publishedAt":"2026-10-20T16:49:36.239+00:00","modifiedAt":"2026-10-21T15:53:31.741+00:00","affected":[{"ecosystem":"Vendor product","name":"apostrophe","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"apostrophecms\",\n                    \"product\": \"apostrophe\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 4.33.0\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"form","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"@apostrophecms\",\n                    \"product\": \"form\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.5.5\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f","https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce","https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350","https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-113656","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-113656","identifiers":["CVE-2026-113656"]},"retained":false,"historicalAffected":[]},{"revision":"4251d958645143c39dfa1c6eaa7d241e","observedAt":"2026-11-07T04:34:18.08+00:00","statement":{"source":"euvd","id":"EUVD-2026-105185","aliases":["CVE-2026-113656","GHSA-89mh-mm8c-mv7f"],"title":"ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size,…","description":"ApostropheCMS is an open-source Node.js content management system. Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size, count, and rate limits. Repeated unauthenticated submissions can consume temporary disk storage and disrupt form handling or other host services. This issue is fixed in ApostropheCMS Form 1.5.5.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":null}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f","https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce","https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350","https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-105185","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 20, 2026, 4:49:36 PM","dateUpdated":"Oct 21, 2026, 3:53:31 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. 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Prior to 1.5.5 of the ApostropheCMS Form add-on, its form submission route stages unbounded multipart uploads before form validation or authentication and lacks upload size, count, and rate limits. Repeated unauthenticated submissions can consume temporary disk storage and disrupt form handling or other host services. This issue is fixed in ApostropheCMS Form 1.5.5.","state":0,"publishedAt":"2026-10-20T17:17:36.643+00:00","modifiedAt":"2026-10-21T16:17:24.097+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":5.3,"severity":"MEDIUM"}],"references":["https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce","https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350","https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5","https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-113656","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Deferred","weaknesses":["CWE-770"],"productCriteria":[],"sourceDates":{"published":"2026-10-20T17:17:36.643","lastModified":"2026-10-21T16:17:24.097"},"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-2026-113656","identifiers":["CVE-2026-113656"]},"retained":false,"historicalAffected":[]},{"revision":"9b3746e4d8214dd1888a066a5ce9b9fc","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-89mh-mm8c-mv7f","aliases":["CVE-2026-113656"],"title":"ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS","description":"**Summary**\nThe form submission endpoint runs `multer({ dest: os.tmpdir() }).any()` before authentication, API-key, CSRF-equivalent, or form-existence logic, with no size/count/rate limits. Unauthenticated users can stream unbounded bodies to disk per request; cleanup occurs only after the full body is received.\n\n**Details**\n`packages/form/index.js` `apiRoutes.post.submit` (L274–296): `[ multer({ dest: os.tmpdir() }).any(), self.normalizeFiles, async function (req) { try { submitForm } finally { unlink files } } ]`. No `limits`, no rate limiting, no pre-validation. \"CSRF\" is a fixed-value double-submit cookie (`vulnlab.csrf=csrf`, set on any GET, express/index.js L694–703) — trivially obtainable anonymously.\n\n**PoC**\n```\n$ curl -s -c csrfjar.cookies http://localhost:3100/        # get vulnlab.csrf=csrf (any GET)\n$ df -P /tmp                                                # before: used=1105212\n$ curl -b csrfjar.cookies -X POST http://localhost:3100/api/v1/@apostrophecms/form/submit \\\n      -F \"file=@/tmp/opencode/big.bin;type=application/octet-stream\" &\n   DURING transfer:    used=1148668\n   still transferring: used=1226936        # +121MB mid-transfer on disk\n   http=500 time=1.78s sent=209715411B     # generic error AFTER full staging\n# Anonymous, zero credentials. 200MB written to /tmp pre-validation.\n```\n\n**Impact**\nAny unauthenticated client can force the server to persist entire request bodies to the temp filesystem and CPU-decode them; parallel requests exhaust disk `/tmp` (process/host crash) and saturate the event loop — a trivial remote DoS. Aborted transfers risk orphaning staged files (no `req.aborted` cleanup).\n\n\n**Remediation** — Set multer `limits` (fileSize, fields, parts, fieldSize); perform auth/role/existence checks before the multer mount or inside the checked handler; unlink staged files on first read and on `req.aborted`/error; add per-IP rate limiting.","state":0,"publishedAt":"2026-10-20T18:08:31+00:00","modifiedAt":"2026-10-20T18:15:04.5261922+00:00","affected":[{"ecosystem":"npm","name":"@apostrophecms/form","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.5.5"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"MODERATE"}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f","https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce","https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350","https://github.com/apostrophecms/apostrophe","https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5"],"sourceUrl":"https://github.com/advisories/GHSA-89mh-mm8c-mv7f","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-89mh-mm8c-mv7f","identifiers":["GHSA-89mh-mm8c-mv7f","CVE-2026-113656"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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