Is CVE-2026-116878 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116878?

CVE-2026-116878 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-116878

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.