{"id":"GHSA-3jp5-3h47-28qf","aliases":["CVE-2026-77606"],"title":"Semantic MediaWiki has reflected XSS in Special:Ask plain table headers","titleSource":"OSV","descriptionSource":"OSV","declaredSeverity":"MODERATE","description":"#### Failure mode\n\nWhen `headers=plain`, table header text was emitted into `<th>` via a raw HTML path. User-controlled `mainlabel` content could therefore become executable HTML.\n\n#### Remediation\n\n- `TableResultPrinter` now applies output-context escaping before passing plain headers to the table renderer.\n- The fix is limited to the HTML/plain-header branch so safe rendering modes are unaffected.\n\n#### Why this is the right layer\n\nThe header value is not a structural token; it is display data. Sanitizing it at the sink is correct because the renderer owns the final HTML emission.","severity":"medium","score":6.1,"published":"2026-09-18T16:40:36.000Z","modified":"2026-09-18T16:45:09.223Z","withdrawn":false,"knownExploited":false,"affected":[{"ecosystem":"Packagist","name":"mediawiki/semantic-media-wiki","sources":[{"name":"OSV · GHSA-3jp5-3h47-28qf","url":"https://osv.dev/vulnerability/GHSA-3jp5-3h47-28qf"}],"ranges":[{"events":[{"introduced":"0"},{"fixed":"7.2.0"}],"type":"ECOSYSTEM"}],"versions":["1.9","1.9-RC1","1.9.0.1","1.9.0.2","1.9.1","1.9.1.1","1.9.2","1.9beta1","2.0","2.0-RC1","2.0-RC2","2.0-RC3","2.1.0","2.1.0-RC1","2.1.1","2.1.2","2.1.3","2.2.0","2.2.0-RC1","2.2.1","2.2.2","2.2.3","2.3.0","2.3.0-RC1","2.3.1","2.4.0","2.4.0-RC1","2.4.1","2.4.2","2.4.3","2.4.4","2.4.5","2.4.6","2.5.0","2.5.0-rc.1","2.5.1","2.5.2","2.5.3","2.5.4","2.5.5","2.5.6","2.5.7","2.5.8","3.0.0","3.0.0-rc.1","3.0.0-rc.2","3.0.1","3.0.2","3.1.0","3.1.0-rc.1","3.1.1","3.1.2","3.1.3","3.1.4","3.1.5","3.1.6","3.2.0","3.2.0-rc.1","3.2.0-rc.2","3.2.1","3.2.2","3.2.3","4.0.0","4.0.1","4.0.2","4.1.0","4.1.1","4.1.2","4.1.3","4.2.0","5.0.0","5.0.1","5.0.2","5.1.0","6.0.0","6.0.1","7.0.0","7.1.0"],"fixed":["7.2.0"]}],"sourceAffected":[],"references":["https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-3jp5-3h47-28qf","https://github.com/SemanticMediaWiki/SemanticMediaWiki","https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.2.0"],"sources":[{"name":"OSV","id":"GHSA-3jp5-3h47-28qf","modified":"2026-09-18T16:45:09.223502576Z","url":"https://osv.dev/vulnerability/GHSA-3jp5-3h47-28qf"}],"assessments":[{"source":"OSV","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N","score":6.1}],"products":[],"remediation":[],"kev":{"status":"not-listed","checkedAt":"2026-10-29T01:50:33.295Z"},"coverage":[{"source":"NVD","status":"not-checked"},{"source":"GHSA","status":"not-checked"},{"source":"EUVD","status":"not-checked"},{"source":"EPSS","status":"not-checked"}],"evidence":[]}