CVE-2026-126562 · Package
NO FIX YET · SEE WHAT TO DO
Semantic MediaWiki before 7.4.1 fails to detect concept pages that reference each other in a loop when the ElasticStore backend is used. A user who can edit pages can create such a loop, so viewing the concept, running Special:Ask, or calling api.php action=ask makes PHP run out of memory or stack and fail.
first public Nov 10, 2026 · 1 source
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Wikis running Semantic MediaWiki from 3.0.0 up to but not including 7.4.1, most relevant where the ElasticStore backend is in use. Exposure requires a user with page-edit rights to create the loop, so wikis that restrict editing to trusted users face less risk. Wikis on 7.4.1 or later are not affected.
Not affected if no-elasticstore, version-7.4.1-or-later
Who cares elasticsearch, mediawiki, php, semantic-mediawiki
Unknown from the sources.
7.4.1 or later.Semantic MediaWiki 3.0.0 before 7.4.1 contains an uncontrolled recursion vulnerability in the ElasticStore ConceptDescriptionInterpreter that only detects directly self-referencing concepts. Users with page-edit rights can create mutually referencing concept pages, causing concept page views, Special:Ask, or api.php action=ask queries to exhaust PHP memory or stack.
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