CVE-2026-116883 Semantic MediaWiki 3.1.0 before 7.3.1 Stored XSS via Schema Descriptions

Medium 4.8 Published 27 Oct 2026 Updated 27 Oct 2026

Exploited in the wild: Not known
Fix: None listed

What is CVE-2026-116883?

CVE-2026-116883 is a medium-severity vulnerability in SemanticMediaWiki, published on 27 Oct 2026.

Official description

Semantic MediaWiki from 3.1.0 before 7.3.1 contains a stored cross-site scripting vulnerability that allows authenticated schema editors to inject HTML through schema descriptions. Attackers with the smw-schemaedit permission can save HTML that is passed unescaped to Html::rawElement() in HtmlBuilder, altering pages and targeting users who view the schema.

Weakness: CWE-79

Which versions are affected by CVE-2026-116883?

How do I fix CVE-2026-116883?

No fix has been published for CVE-2026-116883 yet. Limit exposure of the affected software until one is available.

Is CVE-2026-116883 being exploited?

There is no known exploitation of CVE-2026-116883 in the wild and no public exploit code.

Sources

Also known as GHSA-2xr9-cr6h-wr6m, GHSA-8v49-wg82-6ffh.