Vulnerability Description
Semantic MediaWiki from 3.0.0 before 7.3.1 contains an algorithmic complexity vulnerability in TermParser::normalize_compact_form() that allows unauthenticated attackers to cause quadratic CPU consumption. Attackers can submit long search terms with many distinct in:(...) or has:(...) expressions to Special:Search to exhaust PHP search workers when the extended search engine is enabled.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/c2bf1699dec4016e21
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-
- https://www.vulncheck.com/advisories/semantic-mediawiki-3.0.0-before-7.3.1-denia
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-
FAQ
What is CVE-2026-116872?
CVE-2026-116872 is a vulnerability with a CVSS score of 7.5 (HIGH). Semantic MediaWiki from 3.0.0 before 7.3.1 contains an algorithmic complexity vulnerability in TermParser::normalize_compact_form() that allows unauthenticated attackers to cause quadratic CPU consump...
How severe is CVE-2026-116872?
CVE-2026-116872 has been rated HIGH with a CVSS base score of 7.5/10. Review the CVSS metrics above for detailed severity breakdown.
Is there a patch for CVE-2026-116872?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.