Is CVE-2026-116891 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116891?

CVE-2026-116891 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-116891

Description

SemanticMediaWiki from 4.2.0 before 7.2.1 contains a reflected cross-site scripting vulnerability that allows unauthenticated attackers to inject HTML via unescaped cstate parameters in Special:FacetedSearch. Attackers can craft URLs with q, a matching crc32 csum or filtered=1, and cstate values that break out of hidden input attributes to execute script in victims' browsers.