{"schemaVersion":3,"id":"CVE-2026-34089","aliases":["UBUNTU-CVE-2026-34089"],"status":"published","duplicateOf":null,"title":null,"description":"Vulnerability in Wikimedia Foundation Scribunto.\n\nThis issue affects Scribunto: from 1.45.0 before 1.45.2.","dates":{"published":"2026-05-11T14:46:31.826Z","modified":"2026-05-11T15:53:12.489Z","reserved":null,"kevAdded":[],"kevDue":[]},"cvss":{"headline":{"score":7.5,"severity":"high","version":"3.1","versionLabel":"v3.1","source":"NVD","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","computed":false,"selection":"backend-summary"},"metrics":[{"version":"4.0","versionLabel":"v4.0","source":"CVE.org","score":2.3,"severity":"low","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":false},{"version":"4.0","versionLabel":"v4.0","source":"OSV · Ubuntu","score":2.3,"severity":"low","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","exploitability":null,"impact":null,"computed":true},{"version":"3.1","versionLabel":"v3.1","source":"OSV · Ubuntu","score":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":10,"impact":6,"computed":true},{"version":"4.0","versionLabel":"v4.0","source":"NVD","score":2.3,"severity":"low","vector":"CVSS:4.0/AV:N/AC:H/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/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":7.5,"severity":"high","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","exploitability":null,"impact":null,"computed":false}]},"epss":{"probability":0.00427,"percentile":0.3559,"severity":"low","asOf":"2026-10-20T00:00:00.000Z","change":{"pp":0.08000000000000004,"baselineDate":"2026-09-20T00:00:00.000Z","baselineScore":0.00347},"history":[{"date":"2026-09-14T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-15T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-16T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-17T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-18T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-19T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-20T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00427,"percentile":0.3559}],"last30":[{"date":"2026-09-20T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-21T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-22T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-23T00:00:00.000Z","score":0.00347,"percentile":null},{"date":"2026-09-24T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-25T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-26T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-27T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-28T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-29T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-09-30T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-01T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-02T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-03T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-04T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-05T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-06T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-07T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-08T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-09T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-10T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-11T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-12T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-13T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-14T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-15T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-16T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-17T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-18T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-19T00:00:00.000Z","score":0.00427,"percentile":null},{"date":"2026-10-20T00:00:00.000Z","score":0.00427,"percentile":0.3559}]},"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":[{"id":"REF_D62DBDEA50459A99","name":"Exploit Reference (phabricator.wikimedia.org)","source":"reference","url":"https://phabricator.wikimedia.org/T419168","maturity":"unknown","reliabilityScore":0.2,"verified":false,"type":null,"platforms":[],"requiresAuth":null,"exploitdb":null,"metasploit":null}],"exploitCount":1,"weaknesses":[{"id":"CWE-401","name":"Missing Release of Memory after Effective Lifetime","description":"The product does not sufficiently track and release allocated memory after it has been used, making the memory unavailable for reallocation and reuse.","type":"weakness","status":"Draft","abstraction":"Variant","likelihoodOfExploit":"Medium","url":"https://cwe.mitre.org/data/definitions/401.html"},{"id":"CWE-79","name":"Improper Neutralization of Input During Web Page Generation ('Cross-site Scripting')","description":"The product does not neutralize or incorrectly neutralizes user-controllable input before it is placed in output that is used as a web page that is served to other users.","type":"weakness","status":"Stable","abstraction":"Base","likelihoodOfExploit":"High","url":"https://cwe.mitre.org/data/definitions/79.html"}],"affected":[{"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":"wikimedia foundation","product":"scribunto","name":"Scribunto","label":"scribunto","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.45.0, < 1.45.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.45.0, < 1.45.2","eol":null,"hubHref":"/vendor/wikimedia_foundation/scribunto"},{"vendor":"wikimedia","product":"scribunto","name":"scribunto","label":"scribunto","ecosystem":null,"cpePart":"a","purl":null,"purlType":null,"versions":[{"text":"≥ 1.45.0, < 1.45.2","noFixRecorded":false,"fixedIn":null}],"versionsText":"≥ 1.45.0, < 1.45.2","eol":null,"hubHref":"/vendor/wikimedia/scribunto"}],"affectedCount":3,"eol":{"hasEol":false,"count":0},"references":[{"url":"https://phabricator.wikimedia.org/T419168","label":"phabricator.wikimedia.org/T419168","hostname":"phabricator.wikimedia.org","tags":["REPORT","Exploit","Vendor Advisory"]},{"url":"https://ubuntu.com/security/CVE-2026-34089","label":"ubuntu.com/security/CVE-2026-34089","hostname":"ubuntu.com","tags":["REPORT"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-34089","label":"www.cve.org/CVERecord?id=CVE-2026-34089","hostname":"www.cve.org","tags":["REPORT"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/extensions/Scribunto/+/1265609","label":"gerrit.wikimedia.org/r/c/mediawiki/extensions/Scribunto/+/1265609","hostname":"gerrit.wikimedia.org","tags":["REPORT"]},{"url":"https://lists.wikimedia.org/hyperkitty/list/wikitech-l@lists.wikimedia.org/thread/DIBLSBHISKX6NFRUFNOGZRVW42E7R2QP/","label":"lists.wikimedia.org/hyperkitty/…","hostname":"lists.wikimedia.org","tags":["REPORT"]}],"lineage":{"upstream":[],"downstream":[],"duplicates":[],"related":[]},"timeline":[{"kind":"published","date":"2026-05-11T14:46:31.826Z","label":"Published","detail":"Vulnerability first disclosed.","source":null},{"kind":"modified","date":"2026-05-11T15:53:12.489Z","label":"Last modified","detail":"Vulnerability information updated.","source":null}],"risk":{"score":40,"level":"medium","profile":"Default","thresholds":{"critical":75,"high":50,"medium":25,"low":10}},"meta":{"dataAsOf":"2026-10-21T00:03:25.653Z","stale":false,"partial":false}}