Is CVE-2026-116871 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116871?

CVE-2026-116871 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-116871

Description

Semantic MediaWiki 3.0.0 before 7.3.1 contains an uncontrolled recursion vulnerability in LegacyParser::getSubqueryDescription() that processes nested query tokens before depth limits apply. Unauthenticated attackers can submit deeply nested query elements to the action=ask API to consume substantial CPU and memory, tying up request workers.