{"id":"CVE-2026-71553","aliases":["EUVD-2026-60442","GHSA-vmg4-6gfg-83qx"],"status":"published","title":"ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS","description":"ApostropheCMS is an open-source Node.js content management system. In 4.32.0 and earlier, PATCH /api/v1/article/:id accepts the inherited path toString.call and passes it through the utility module to apos.util.set() and apos.util.get(), allowing an authenticated editor to overwrite the shared Object.prototype.toString function's call property and cause a persistent process-wide denial of service until restart.","severity":{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"cna","from":"cve"},"epss":{"day":"2026-11-11","score":0.00429,"percentile":0.37573,"model":"v2026.06.15"},"facts":{"in_kev":false,"known_exploited":false,"public_exploit":false,"fix_available":true},"cwes":["CWE-1321"],"published":"2026-08-17T20:03:37Z","modified":"2026-10-28T15:30:05Z","fixes":[{"ecosystem":"npm","package":"apostrophe","fixed_in":["4.32.1"],"sources":["ghsa","osv"]}],"affected":[{"source":"ghsa","ecosystem":"npm","package":"apostrophe","ranges":[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"last_affected":"4.32.0"},{"fixed":"4.32.1"}]}]},{"source":"osv","ecosystem":"npm","package":"apostrophe","ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"4.32.1"}]}]}],"products":[{"vendor":"apostrophecms","product":"apostrophe"}],"references":[{"url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx","tags":["x_refsource_CONFIRM","advisory","web"]},{"url":"https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd","tags":["x_refsource_MISC","fix","web"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-71553","tags":["advisory"]},{"url":"https://github.com/advisories/GHSA-vmg4-6gfg-83qx"},{"url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/71xxx/CVE-2026-71553.json","tags":["advisory"]},{"url":"https://github.com/apostrophecms/apostrophe","tags":["package"]}],"sources":{"cve":[{"id":"CVE-2026-71553","title":"ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS","description":"ApostropheCMS is an open-source Node.js content management system. In 4.32.0 and earlier, PATCH /api/v1/article/:id accepts the inherited path toString.call and passes it through the utility module to apos.util.set() and apos.util.get(), allowing an authenticated editor to overwrite the shared Object.prototype.toString function's call property and cause a persistent process-wide denial of service until restart.","status":"published","published":"2026-08-17T20:03:37.883Z","modified":"2026-08-17T20:14:15.721Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high","assessor":"cna"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:19:49.559463Z"}],"euvd":[{"id":"EUVD-2026-60442","description":"ApostropheCMS is an open-source Node.js content management system. In 4.32.0 and earlier, PATCH /api/v1/article/:id accepts the inherited path toString.call and passes it through the utility module to apos.util.set() and apos.util.get(), allowing an authenticated editor to overwrite the shared Object.prototype.toString function's call property and cause a persistent process-wide denial of service until restart.","status":"published","published":"2026-08-17T20:03:37Z","modified":"2026-08-17T20:14:15Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"updated_at":"2026-11-02T18:01:48.026284Z"}],"ghsa":[{"id":"GHSA-vmg4-6gfg-83qx","title":"ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS","description":"The vulnerability is a single-request persistent DoS by submitting e.g.\n\"PATCH /api/v1/article/\u003cid\u003e\" with a valid editor session and body of\n{\"toString.call\":\"x\"}, overwriting the global toString function with\nvalue x.\n\nFabian","status":"published","published":"2026-09-02T15:12:41Z","modified":"2026-10-28T15:12:57Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:41:38.969831Z"}],"nvd":[{"id":"CVE-2026-71553","description":"ApostropheCMS is an open-source Node.js content management system. In 4.32.0 and earlier, PATCH /api/v1/article/:id accepts the inherited path toString.call and passes it through the utility module to apos.util.set() and apos.util.get(), allowing an authenticated editor to overwrite the shared Object.prototype.toString function's call property and cause a persistent process-wide denial of service until restart.","status":"published","published":"2026-08-17T20:16:46.073Z","modified":"2026-10-23T16:10:00.313Z","cvss":[{"version":"4.0","score":7.1,"vector":"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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","level":"high","assessor":"secondary"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T14:12:38.647684Z"}],"osv":[{"id":"CVE-2026-71553","title":"ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS","description":"ApostropheCMS is an open-source Node.js content management system. In 4.32.0 and earlier, PATCH /api/v1/article/:id accepts the inherited path toString.call and passes it through the utility module to apos.util.set() and apos.util.get(), allowing an authenticated editor to overwrite the shared Object.prototype.toString function's call property and cause a persistent process-wide denial of service until restart.","status":"published","published":"2026-08-17T20:03:37.883Z","modified":"2026-10-28T02:30:50.038014786Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:45:15.511448Z"},{"id":"GHSA-vmg4-6gfg-83qx","title":"ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS","description":"The vulnerability is a single-request persistent DoS by submitting e.g.\n\"PATCH /api/v1/article/\u003cid\u003e\" with a valid editor session and body of\n{\"toString.call\":\"x\"}, overwriting the global toString function with\nvalue x.\n\nFabian","status":"published","published":"2026-09-02T15:12:41Z","modified":"2026-10-28T15:30:05.148944684Z","cvss":[{"version":"4.0","score":7.1,"vector":"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","level":"high"}],"cwes":["CWE-1321"],"updated_at":"2026-11-02T15:46:57.348035Z"}]}}