{"schemaVersion":3,"id":"CVE-2026-105436","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Deserialization of Untrusted Data vulnerability in MainWP MainWP Child mainwp-child allows Object Injection.This issue affects MainWP Child: from n/a through 6.2.1.","dates":{"published":"2026-10-08T17:00:12.300Z","modified":"2026-10-09T15:15:11.490Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":8.8,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":8.8,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"wordfence","score":8.1,"severity":"high","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00252,"percentile":0.15691,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-10-09T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00252,"percentile":0.15691}],"last30":[{"date":"2026-10-09T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00252,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00252,"percentile":0.15691}]},"kev":{"state":"not-listed","entries":[],"listedCount":0,"totalCatalogs":3,"catalogs":[{"source":"cisa","label":"CISA","listed":false,"entry":null},{"source":"enisa","label":"ENISA","listed":false,"entry":null},{"source":"circl","label":"CIRCL","listed":false,"entry":null}]},"ransomware":{"state":"none-recorded","sources":[]},"exploits":[],"exploitCount":0,"weaknesses":[{"id":"CWE-502","name":"Deserialization of Untrusted Data","description":"The product deserializes untrusted data without sufficiently ensuring that the resulting data will be valid.","type":"weakness","status":"Draft","abstraction":"Base","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/502.html"}],"affected":[{"vendor":"mainwp","product":"mainwp_child","name":"mainwp child","label":"mainwp_child","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 6.2.1","noFixRecorded":false,"fixedIn":null}],"versionsText":"≤ 6.2.1","eol":null,"hubHref":"/vendor/mainwp/mainwp_child"},{"vendor":"wordpress","product":"mainwp-child","name":"MainWP Child – Securely Connects to the MainWP Dashboard to Manage Multiple Sites","label":"mainwp-child","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≤ 6.2.1 (fixed in 6.2.2)","noFixRecorded":false,"fixedIn":"6.2.2"}],"versionsText":"≤ 6.2.1 (fixed in 6.2.2)","eol":null,"hubHref":null}],"affectedCount":2,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://patchstack.com/database/wordpress/plugin/mainwp-child/vulnerability/wordpress-mainwp-child-plugin-6-2-1-deserialization-of-untrusted-data-vulnerability?_s_id=cve","label":"patchstack.com/database/…","hostname":"patchstack.com","tags":["VDB Entry"]},{"url":"https://www.wordfence.com/threat-intel/vulnerabilities/id/8ad6ddec-e25f-4553-a116-25a44acdcbbf","label":"www.wordfence.com/threat-intel/vulnerabilities/id/8ad6ddec-e25f-4553-a116-25a44acdcbbf","hostname":"www.wordfence.com","tags":["Vendor Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-10-08T17:00:12.300Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-09T15:15:11.490Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":35,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T13:40:10.300Z","stale":false,"partial":false}}