Vulnerability 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.
CVSS Score
HIGH
Related Weaknesses (CWE)
References
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/15ed8489a4ca142ea5
- https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-
- https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.3.1-resou
FAQ
What is CVE-2026-116878?
CVE-2026-116878 is a vulnerability with a CVSS score of 7.5 (HIGH). 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 Speci...
How severe is CVE-2026-116878?
CVE-2026-116878 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-2026-116878?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.