{"schemaVersion":3,"id":"CVE-2026-58027","aliases":["UBUNTU-CVE-2026-58027","DEBIAN-CVE-2026-58027"],"status":"published","duplicateOf":null,"title":null,"description":"Exposure of Sensitive Information to an Unauthorized Actor vulnerability in Wikimedia Foundation AbuseFilter.\n\n This vulnerability is associated with program files includes/Api/QueryAbuseFilters.Php.\n\n\n\nThis issue affects AbuseFilter: from * before 1.46.0, 1.45.4, 1.44.6, 1.43.9.","dates":{"published":"2026-07-01T15:01:00.948Z","modified":"2026-07-01T15:49:32.627Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":6.5,"severity":"medium","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Ubuntu","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Debian","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":7.2,"impact":6,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":5.3,"severity":"medium","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:L/VI:N/VA:N/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","exploitability":null,"impact":null,"computed":false},{"version":"3.1","versionLabel":"v3.1","source":"NVD","score":6.5,"severity":"medium","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:N","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00371,"percentile":0.29606,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00371},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00371,"percentile":0.29606}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00371,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00371,"percentile":0.29606}]},"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-200","name":"Exposure of Sensitive Information to an Unauthorized Actor","description":"The product exposes sensitive information to an actor that is not explicitly authorized to have access to that information.","type":"weakness","status":"Draft","abstraction":"Class","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/200.html"}],"affected":[{"vendor":"debian","product":"mediawiki","name":"mediawiki","label":"mediawiki","ecosystem":"Debian","cpePart":null,"purl":"pkg:deb/debian/mediawiki","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null},{"text":"< 1:1.43.9+dfsg-1~deb13u1","noFixRecorded":false,"fixedIn":null},{"text":"< 1:1.43.9+dfsg-1","noFixRecorded":false,"fixedIn":null}],"versionsText":"All versions (No fix recorded) | < 1:1.43.9+dfsg-1~deb13u1 | < 1:1.43.9+dfsg-1","eol":null,"hubHref":null},{"vendor":"ubuntu","product":"mediawiki","name":"mediawiki","label":"mediawiki","ecosystem":"Ubuntu","cpePart":null,"purl":"pkg:deb/ubuntu/mediawiki","purlType":"deb","versions":[{"text":"All versions","noFixRecorded":true,"fixedIn":null}],"versionsText":"All versions (No fix recorded)","eol":null,"hubHref":null},{"vendor":"mediawiki","product":"mediawiki","name":"mediawiki","label":"mediawiki","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.43.0, < 1.43.9","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.44.0, < 1.44.6","noFixRecorded":false,"fixedIn":null},{"text":"≥ 1.45.0, < 1.45.4","noFixRecorded":false,"fixedIn":null},{"text":"1.46.0:rc0","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.43.0, < 1.43.9 | ≥ 1.44.0, < 1.44.6 | ≥ 1.45.0, < 1.45.4 | 1.46.0:rc0","eol":{"isEol":false,"eolDate":"2027-07-31T00:00:00.000Z","matchMethod":"cpe","cycle":{"name":"1.46","label":"1.46","eolFrom":"2027-07-31T00:00:00.000Z","isLts":false,"isMaintained":true,"latestVersion":"1.46.2"},"product":{"name":"mediawiki","label":"MediaWiki","category":"server-app"}},"hubHref":"/vendor/mediawiki/mediawiki"},{"vendor":"wikimedia foundation","product":"abusefilter","name":"AbuseFilter","label":"abusefilter","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"< 1.46.0, 1.45.4, 1.44.6, 1.43.9","noFixRecorded":false,"fixedIn":null}],"versionsText":"< 1.46.0, 1.45.4, 1.44.6, 1.43.9","eol":null,"hubHref":"/vendor/wikimedia_foundation/abusefilter"}],"affectedCount":4,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://phabricator.wikimedia.org/T406954","label":"phabricator.wikimedia.org/T406954","hostname":"phabricator.wikimedia.org","tags":["REPORT","Permissions Required"]},{"url":"https://ubuntu.com/security/CVE-2026-58027","label":"ubuntu.com/security/CVE-2026-58027","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58027","label":"www.cve.org/CVERecord?id=CVE-2026-58027","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/AbuseFilter/+/1306182","label":"gerrit.wikimedia.org/r/c/mediawiki/extensions/AbuseFilter/+/1306182","hostname":"gerrit.wikimedia.org","tags":["REPORT"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/AbuseFilter/+/1306181","label":"gerrit.wikimedia.org/r/c/mediawiki/extensions/AbuseFilter/+/1306181","hostname":"gerrit.wikimedia.org","tags":["REPORT"]},{"url":"https://security-tracker.debian.org/tracker/CVE-2026-58027","label":"security-tracker.debian.org/tracker/CVE-2026-58027","hostname":"security-tracker.debian.org","tags":["Advisory"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-07-01T15:01:00.948Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-07-01T15:49:32.627Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":26,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-20T17:46:24.229Z","stale":false,"partial":false}}