{"id":"CVE-2026-116878","revision":"509af3f277cd46668b7b115db06cb15d","records":[{"revision":"509af3f277cd46668b7b115db06cb15d","observedAt":"2026-10-27T12:09:21.929+00:00","statement":{"source":"cve-program","id":"CVE-2026-116878","aliases":[],"title":"Semantic MediaWiki 2.5.0 before 7.3.1 Resource Exhaustion via Special:PropertyLabelSimilarity","description":"Semantic MediaWiki from 2.5.0 before 7.3.1 contains an uncontrolled resource consumption vulnerability that allows anonymous attackers to force quadratic computation by supplying a zero limit to Special:PropertyLabelSimilarity. Attackers can send repeated requests with limit=0 to bypass the SQL LIMIT and trigger pairwise similar_text() comparisons, exhausting PHP CPU, memory, and database connections.","state":0,"publishedAt":"2026-10-27T10:23:30.985+00:00","modifiedAt":"2026-10-27T10:26:42.767+00:00","affected":[{"ecosystem":"Vendor product","name":"SemanticMediaWiki","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"SemanticMediaWiki\",\n                    \"product\": \"SemanticMediaWiki\",\n                    \"defaultStatus\": \"unaffected\",\n                    \"versions\": [\n                        {\n                            \"version\": \"2.5.0\",\n                            \"status\": \"affected\",\n                            \"versionType\": \"semver\",\n                            \"lessThan\": \"7.3.1\"\n                        },\n                        {\n                            \"version\": \"7.3.1\",\n                            \"status\": \"unaffected\",\n                            \"versionType\": \"semver\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.7,"severity":"HIGH"},{"system":"CVSS 3.1","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","score":7.5,"severity":"HIGH"}],"references":["https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-wh64-r5x2-vjgf","https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/15ed8489a4ca142ea5417d0c4403dbbe0a3ee3f5","https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.3.1-resource-exhaustion-via-special-propertylabelsimilarity"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-116878","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-116878","identifiers":["CVE-2026-116878"]},"retained":false,"historicalAffected":[]}],"coverage":[]}