{"schema_version":"1.9.2","id":"GHSA-vmg4-6gfg-83qx","published":"2026-09-02T15:12:41Z","modified":"2026-10-28T15:30:05.148944684Z","aliases":["CVE-2026-71553"],"summary":"ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS","details":"The vulnerability is a single-request persistent DoS by submitting e.g.\n\"PATCH /api/v1/article/<id>\" with a valid editor session and body of\n{\"toString.call\":\"x\"}, overwriting the global toString function with\nvalue x.\n\nFabian","affected":[{"package":{"name":"apostrophe","ecosystem":"npm","purl":"pkg:npm/apostrophe"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.32.1"}]}],"database_specific":{"last_known_affected_version_range":"<= 4.32.0","source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/09/GHSA-vmg4-6gfg-83qx/GHSA-vmg4-6gfg-83qx.json"}}],"references":[{"type":"WEB","url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71553"},{"type":"WEB","url":"https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd"},{"type":"PACKAGE","url":"https://github.com/apostrophecms/apostrophe"}],"database_specific":{"cwe_ids":["CWE-1321"],"github_reviewed":true,"github_reviewed_at":"2026-09-02T15:12:41Z","nvd_published_at":"2026-08-17T20:16:46Z","severity":"HIGH"},"severity":[{"type":"CVSS_V4","score":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:L/VA:H/SC:N/SI:N/SA:N"}]}