Is CVE-2026-116889 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116889?

CVE-2026-116889 has a CVSS v3 severity of MEDIUM (6.1).

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CVE-2026-116889

Description

SemanticMediaWiki from 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject script through Code-typed property values. Attackers can annotate a valid JSON value embedding HTML markup, which the CodeStringValueFormatter renders unescaped on Special:Browse, executing JavaScript in viewers' sessions.