{"id":"CVE-2026-58035","aliases":["EUVD-2026-41009","GHSA-gvg3-mcqq-v953","UBUNTU-CVE-2026-58035"],"status":"published","title":"Stored XSS through a system message in the codex version of Special:Block","description":"Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki.\n\n This vulnerability is associated with program files 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foundation","product":"mediawiki"}],"references":[{"url":"https://phabricator.wikimedia.org/T428809","tags":["Permissions Required","report"]},{"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-58035"},{"url":"https://github.com/advisories/GHSA-gvg3-mcqq-v953"},{"url":"https://ubuntu.com/security/CVE-2026-58035","tags":["report"]},{"url":"https://www.cve.org/CVERecord?id=CVE-2026-58035","tags":["report"]},{"url":"https://gerrit.wikimedia.org/r/c/mediawiki/core/+/1305173","tags":["report"]}],"sources":{"cve":[{"id":"CVE-2026-58035","title":"Stored XSS through a system message in the codex version of Special:Block","description":"Improper Neutralization of Input During Web Page Generation (XSS or 'Cross-site Scripting') vulnerability in Wikimedia Foundation MediaWiki.\n\n This vulnerability is associated with program files 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This vulnerability is associated with program files resources/src/mediawiki.Special.Block/SpecialBlock.Vue.","status":"published","published":"2026-07-01T15:17:00Z","modified":"2026-10-17T12:59:13.491293607Z","cvss":[{"version":"4.0","score":0,"vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:H/UI:P/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N","level":"none"},{"version":"3.1","score":4.8,"vector":"CVSS:3.1/AV:N/AC:L/PR:H/UI:R/S:C/C:L/I:L/A:N","level":"medium"}],"updated_at":"2026-11-02T16:56:41.911783Z"}]}}