CVE-2026-116882 Semantic MediaWiki 4.2.0 before 7.3.1 Stored XSS via FacetedSearch Exploration Labels

Medium 4.8 Published 27 Oct 2026 Updated 27 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-116882?

CVE-2026-116882 is a medium-severity vulnerability in SemanticMediaWiki, published on 27 Oct 2026.

Official description

Semantic MediaWiki from 4.2.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows authenticated profile or schema editors to inject HTML through FacetedSearch exploration-link labels. Attackers can store markup in the label, which ExploreListBuilder::buildHTML() passes unescaped to Html::rawElement(), altering the Special:FacetedSearch page and potentially running scripts in viewers' browsers.

Weakness: CWE-79

Which versions are affected by CVE-2026-116882?

How do I fix CVE-2026-116882?

No fix has been published for CVE-2026-116882 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-116882 being exploited?

There is no known exploitation of CVE-2026-116882 in the wild and no public exploit code.

Sources

Also known as GHSA-3r5m-693w-jm33, GHSA-vffw-jhh9-h949.