{"id":"CVE-2026-71553","state":"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.","publishedAt":"2026-08-17T20:03:37.883Z","updatedAt":"2026-08-17T20:14:15.721Z","severity":{"score":7.1,"label":"High","version":"4.0","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","source":"GitHub_M"},"assigner":"GitHub_M","products":["apostrophecms apostrophe"],"affected":[{"vendor":"apostrophecms","product":"apostrophe","versions":[{"version":"<= 4.32.0","status":"affected"}]}],"references":["https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx","https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd"],"weaknesses":["CWE-1321"],"ingestedAt":"2026-10-29T20:12:49.727Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/71xxx/CVE-2026-71553.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-71553","state":"PUBLISHED","datePublished":"2026-08-17T20:03:37.883Z","dateUpdated":"2026-08-17T20:14:15.721Z","assignerShortName":"GitHub_M","assignerOrgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateReserved":"2026-08-06T21:24:15.376Z"},"containers":{"cna":{"title":"ApostropheCMS: 2nd-order prototype pollution via PATCH leading to single-request persistent DoS","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"apostrophecms","product":"apostrophe","versions":[{"version":"<= 4.32.0","status":"affected"}]}],"references":[{"url":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx","name":"https://github.com/apostrophecms/apostrophe/security/advisories/GHSA-vmg4-6gfg-83qx","tags":["x_refsource_CONFIRM"]},{"url":"https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd","name":"https://github.com/apostrophecms/apostrophe/commit/5a3746aaed49761e171c2cbfe793267c959829fd","tags":["x_refsource_MISC"]}],"metrics":[{"cvssV4_0":{"attackVector":"NETWORK","attackComplexity":"LOW","attackRequirements":"NONE","privilegesRequired":"LOW","userInteraction":"NONE","vulnConfidentialityImpact":"NONE","vulnIntegrityImpact":"LOW","vulnAvailabilityImpact":"HIGH","subConfidentialityImpact":"NONE","subIntegrityImpact":"NONE","subAvailabilityImpact":"NONE","baseScore":7.1,"baseSeverity":"HIGH","vectorString":"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","version":"4.0"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-1321","lang":"en","description":"CWE-1321: Improperly Controlled Modification of Object Prototype Attributes ('Prototype Pollution')","type":"CWE"}]}],"providerMetadata":{"shortName":"GitHub_M","orgId":"a0819718-46f1-4df5-94e2-005712e83aaa","dateUpdated":"2026-08-17T20:03:37.883Z"},"source":{"advisory":"GHSA-vmg4-6gfg-83qx","discovery":"UNKNOWN"}},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-08-17T20:14:00.169874Z","id":"CVE-2026-71553","options":[{"Exploitation":"none"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-08-17T20:14:15.721Z"}}]}}}