Vulnerability Details CVE-2026-116877
Semantic MediaWiki from 2.5.0 before 7.3.1 contains an uncontrolled resource consumption vulnerability that allows low-privilege editors to bypass smwgMaxNumRecurringEvents by supplying a large limit parameter. Attackers can save pages using #set_recurring_event without an end date to generate thousands or millions of date subobjects, exhausting CPU, memory, and database resources.
Exploit prediction scoring system (EPSS) score
EPSS Score 0.004
EPSS Ranking 31.7%
CVSS Severity
CVSS v3 Score 6.5
References
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/215599f0fc03274fd4cee9ba0f7162f5a38c031b
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-vxrm-2g9f-2vqh
- https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.3.1-resource-exhaustion-via-set-recurring-event
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-vxrm-2g9f-2vqh
Products affected by CVE-2026-116877
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.0
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.1
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.2
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.3
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.4
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.5
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.6
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.7
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:2.5.8
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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
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:4.2.0
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:5.0.0
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:7.2.1
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cpe:2.3:a:semantic-mediawiki:semantic_mediawiki:7.3.0