{"id":"CVE-2026-113656","title":"ApostropheCMS: Unauthenticated unbounded multipart upload → disk-exhaustion DoS","summary":"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 si…","severity":"medium","cvss":5.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:L","cvssSource":"cna","cwe":["CWE-770"],"vendor":"apostrophecms","product":"apostrophe","affected":["apostrophe < 4.33.0","form < 1.5.5"],"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"partial","timestamp":"2026-10-21T14:40:27.714281Z"},"published":"2026-10-20","updated":"2026-10-21","sourceUpdated":"2026-10-21T15:53:31.741Z","source":"CVEORG","sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-113656","references":[{"url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f","label":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-89mh-mm8c-mv7f"},{"url":"https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce","label":"https://github.com/apostrophecms/apostrophe/commit/9500b8b0e1d630d5e07fbb5fd2c25ed0943845ce"},{"url":"https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350","label":"https://github.com/apostrophecms/apostrophe/commit/f84fd41cbf6c22eb8d0008fc9c25df1f7130b350"},{"url":"https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5","label":"https://github.com/apostrophecms/apostrophe/releases/tag/@apostrophecms/form@1.5.5"},{"url":"https://github.com/advisories/GHSA-89mh-mm8c-mv7f"}],"tags":["cve.org","ghsa","npm"],"epss":0.00462,"epssPercentile":0.39879,"aliases":["GHSA-89mh-mm8c-mv7f"],"ecosystem":"npm","patched":["@apostrophecms/form 1.5.5"],"ingestedAt":"2026-10-20T17:12:53.597Z","slug":"CVE-2026-113656","body":"## Overview\n\nApostropheCMS 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.\n\n## Affected\n\n- `apostrophe < 4.33.0`\n- `form < 1.5.5`\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.\n\n## Package advisory (CVE-2026-113656)\n\nAffected packages:\n\n- `@apostrophecms/form < 1.5.5`\n\nPatched in:\n\n- `@apostrophecms/form 1.5.5`\n\nSource: https://github.com/advisories/GHSA-89mh-mm8c-mv7f","depth":"sunlit","depthScore":29,"depthScoreParts":{"impact":29.2,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}