Is CVE-2026-116886 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-116886?

CVE-2026-116886 has a CVSS v3 severity of MEDIUM (5.4).

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CVE-2026-116886

Description

Semantic MediaWiki from 2.5.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows users with page-edit rights to inject scripts via External identifier property values. Attackers can annotate markup payloads that ExternalIdentifierValue renders unescaped on Special:Browse, executing JavaScript in viewers' sessions, including administrators.