{"id":"CVE-2026-100240","title":"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…","summary":"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…","severity":"critical","cvss":9.1,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N","cwe":["CWE-862"],"vendor":"Wikimedia Foundation","product":"Mediawiki - TemplateSandbox Extension","affected":["mediawiki_-_templatesandbox_extension < 1.46.1, 1.45.5, 1.43.10"],"published":"2026-09-29","updated":"2026-10-01","sourceUpdated":"2026-10-01T19:17:16.217","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-100240","references":[{"url":"https://gerrit.wikimedia.org/r/q/Iaf9f6e2280798af5516197257ddc0264b9ad9fb7","label":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"},{"url":"https://phabricator.wikimedia.org/T407974","label":"c4f26cc8-17ff-4c99-b5e2-38fc1793eacc"}],"tags":["nvd","cve.org"],"epss":0.00298,"epssPercentile":0.22331,"ssvc":{"exploitation":"none","automatable":"yes","technicalImpact":"total","timestamp":"2026-10-01T18:07:46.261263Z"},"ingestedAt":"2026-09-29T16:39:33.274Z","slug":"CVE-2026-100240","body":"## Overview\n\nMissing 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"midnight","depthScore":50,"depthScoreParts":{"impact":50.1,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[{"seq":214610,"id":"CVE-2026-100240","ts":1790881125779,"field":"cvss","old":null,"new":"9.1"},{"seq":214609,"id":"CVE-2026-100240","ts":1790881125779,"field":"severity","old":"none","new":"critical"}]}