{"affected":[{"defaultStatus":"unaffected","ecosystem":"composer","packageName":"mediawiki/semantic-media-wiki","product":"SemanticMediaWiki","source":"CNA: VulnCheck","vendor":"SemanticMediaWiki","versions":[{"lessThan":"7.4.1","status":"affected","version":"3.0.0","versionType":"semver"},{"status":"unaffected","version":"7.4.1","versionType":"semver"}]}],"cveId":"CVE-2026-126562","cwes":["CWE-674"],"description":"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.","epss":{"date":"2026-11-13","percentile":0.29114,"score":0.0035},"exploits":[{"kind":"exploit","source":"ADP: CISA-ADP","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-jwx8-mm92-gv95"}],"kev":null,"metrics":[{"score":5.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N","version":"4.0"},{"score":4.3,"severity":"medium","source":"CNA: VulnCheck","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"},{"score":5.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","version":"4.0"},{"score":4.3,"severity":"medium","source":"NVD: disclosure@vulncheck.com","vector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","version":"3.1"}],"modifiedAt":1794626144614,"publishedAt":1794364558607,"references":[{"source":"CNA: VulnCheck","tags":["vendor-advisory"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-jwx8-mm92-gv95"},{"source":"CNA: VulnCheck","tags":["patch"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/35d8f8c9c7b48a476751ca0b795b78b648756828"},{"source":"CNA: VulnCheck","tags":["release-notes"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1"},{"source":"CNA: VulnCheck","tags":["technical-description"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/7.4.0/src/Elastic/QueryEngine/DescriptionInterpreters/ConceptDescriptionInterpreter.php#L34-L75"},{"source":"CNA: VulnCheck","tags":["third-party-advisory"],"url":"https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.4.1-uncontrolled-recursion-via-elasticstore-conceptdescriptioninterpreter"},{"source":"ADP: CISA-ADP","tags":["exploit"],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-jwx8-mm92-gv95"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/blob/7.4.0/src/Elastic/QueryEngine/DescriptionInterpreters/ConceptDescriptionInterpreter.php#L34-L75"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/35d8f8c9c7b48a476751ca0b795b78b648756828"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-jwx8-mm92-gv95"},{"source":"disclosure@vulncheck.com","tags":[],"url":"https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.4.1-uncontrolled-recursion-via-elasticstore-conceptdescriptioninterpreter"}],"remediation":[{"kind":"fix","source":"CNA: VulnCheck","text":"The reporting source identifies this reference as a patch. Check the advisory for affected versions and supported release branches.","url":"https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/35d8f8c9c7b48a476751ca0b795b78b648756828"}],"revision":"72e18ee89767a4270138920666b070bcf77f2e60a2fb59db46ac10bb04bf4010","sources":[{"modifiedAt":1794626144614,"name":"CNA: VulnCheck","retrievedAt":1794629321745,"url":"https://www.cve.org/CVERecord?id=CVE-2026-126562"},{"modifiedAt":1794519023870,"name":"NVD","retrievedAt":1794529340133,"url":"https://nvd.nist.gov/vuln/detail/CVE-2026-126562"},{"modifiedAt":null,"name":"FIRST EPSS","retrievedAt":1794629327096,"url":"https://api.first.org/data/v1/epss?cve=CVE-2026-126562"}],"ssvc":{"assessedAt":1794626121499,"automatable":"no","exploitation":"poc","source":"ADP: CISA-ADP","technicalImpact":"partial"},"status":"published","title":"Semantic MediaWiki 3.0.0 before 7.4.1 Uncontrolled Recursion via ElasticStore ConceptDescriptionInterpreter","updatedAt":1794629327096}