{"id":"CVE-2026-100240","url":"https://www.cyber-defence.io/tools/cve/CVE-2026-100240","generatedAt":"2026-10-27T22:46:27.014Z","title":"Missing Authorization vulnerability in Wikimedia Foundation Mediawiki - TemplateSandbox Extension allows Accessing Functionality Not Properly Constrained by ACLs.","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.","published":"2026-09-29T17:17:01.000Z","lastModified":"2026-10-01T19:17:16.000Z","status":"Awaiting Analysis","sourceIdentifier":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc","cvss":{"version":"3.1","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"},"cwe":["CWE-862"],"affected":[],"epss":{"score":0.00298,"percentile":0.22271,"date":"2026-10-26","history":[{"date":"2026-09-30","score":0.00147,"percentile":0.03336}]},"kev":{"listed":false},"exploits":{"count":0,"verified":false,"firstPublished":null,"source":"Exploit-DB (https://gitlab.com/exploit-database/exploitdb)","entries":[]},"verdict":{"level":"high","text":"High impact if exploited, but EPSS currently rates exploitation as unlikely (0.30%). Schedule it in the normal patch cycle and watch for a rise in EPSS or a public exploit."},"changes":[{"kind":"scored","label":"Newly scored","at":"2026-10-01T19:30:08.000Z","detail":{"from":null,"score":"9.1","severity":"CRITICAL","fromSeverity":null},"summary":"Now scored CVSS 9.1 CRITICAL."},{"kind":"new","label":"New CVE","at":"2026-09-29T17:17:01.000Z","detail":{"score":null,"severity":null,"publishedAt":"2026-09-29T17:17:01.000Z"},"summary":"New CVE, critical severity (CVSS 9.1)."}],"references":[{"url":"https://gerrit.wikimedia.org/r/q/Iaf9f6e2280798af5516197257ddc0264b9ad9fb7","source":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"},{"url":"https://phabricator.wikimedia.org/T407974","source":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"}],"sources":{"nvd":"https://nvd.nist.gov/vuln/detail/CVE-2026-100240","epss":"https://www.first.org/epss/","kev":"https://www.cisa.gov/known-exploited-vulnerabilities-catalog","exploitdb":"https://www.exploit-db.com/"},"licence":"CC BY 4.0 — link back to the CVE Explorer if you publish the results; upstream data remains subject to its own terms."}