{"schemaVersion":3,"id":"CVE-2026-100240","aliases":[],"status":"published","duplicateOf":null,"title":null,"description":"Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Accessing Functionality Not Properly Constrained by ACLs.\n\nThis issue affects Mediawiki - TemplateSandbox Extension: from * before 1.46.1, 1.45.5, 1.43.10.","dates":{"published":"2026-09-29T16:26:31.215Z","modified":"2026-10-01T18:07:53.717Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":9.1,"severity":"critical","version":"3.1","versionLabel":"v3.1","source":"CVE.org","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"3.1","versionLabel":"v3.1","source":"CVE.org","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":9.1,"severity":"critical","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00298,"percentile":0.21258,"severity":"low","asOf":"2026-10-21T00:00:00.000Z","change":{"pp":null,"baselineDate":null,"baselineScore":null},"history":[{"date":"2026-09-30T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00298,"percentile":0.21258}],"last30":[{"date":"2026-09-30T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00147,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00298,"percentile":null},{"date":"2026-10-21T00:00:00.000Z","score":0.00298,"percentile":0.21258}]},"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-862","name":"Missing Authorization","description":"The product does not perform an authorization check when an actor attempts to access a resource or perform an action.","type":"weakness","status":"Incomplete","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/862.html"}],"affected":[{"vendor":"wikimedia foundation","product":"mediawiki - templatesandbox extension","name":"Mediawiki - TemplateSandbox Extension","label":"mediawiki - templatesandbox extension","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.46.1, 1.45.5, 1.43.10","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.46.1, 1.45.5, 1.43.10","eol":null,"hubHref":"/vendor/wikimedia_foundation/mediawiki_-_templatesandbox_extension"}],"affectedCount":1,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://phabricator.wikimedia.org/T407974","label":"phabricator.wikimedia.org/T407974","hostname":"phabricator.wikimedia.org","tags":[]},{"url":"https://gerrit.wikimedia.org/r/q/Iaf9f6e2280798af5516197257ddc0264b9ad9fb7","label":"gerrit.wikimedia.org/r/q/Iaf9f6e2280798af5516197257ddc0264b9ad9fb7","hostname":"gerrit.wikimedia.org","tags":[]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-09-29T16:26:31.215Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-10-01T18:07:53.717Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":70,"level":"high","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T16:19:04.972Z","stale":false,"partial":false}}