Vulnerability Details CVE-2026-116871
Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion vulnerability in LegacyParser::getSubqueryDescription() that processes nested query tokens before depth limits apply. Unauthenticated attackers can submit deeply nested query elements to the action=ask API to consume substantial CPU and memory, tying up request workers.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 30.5%
CVSS Severity
CVSS v3 Score 7.5
References
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/756492002752f937a9e115e14330b1181bd8c60c
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/e642f38c708dee7da5e885b8d40be8ffc56f3e87
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-f8vw-wvm6-h2qq
- https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.3.1-uncontrolled-recursion-via-special-ask
Products affected by CVE-2026-116871
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.0.0
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.0.1
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.0.2
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.1.0
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.1.1
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.1.2
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.1.3
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.1.4
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.1.5
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.1.6
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.2.0
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.2.1
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.2.2
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:3.2.3
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:4.0.0
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:4.0.1
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:4.0.2
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:4.1.0