Quick answers
- Is CVE-2026-116882 exploited in the wild?
- No. Junglewise Threat Intelligence has no report of CVE-2026-116882 being exploited in the wild.
- How severe is CVE-2026-116882?
- Medium severity, with a CVSS score of 4.8, published 27 October 2026.
- Which products and versions are affected?
- Semantic MediaWiki 4.2.0 through 7.3.0.
- Is there a fix for CVE-2026-116882?
- Yes: fixed in 7.3.1. Until then: Restrict the FacetedSearch profile and schema editing permissions to trusted administrators only. Consider disabling FacetedSearch if not in active use until an upgrade is available. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.
- How is CVE-2026-116882 attacked?
- It is attacked over the network, in a software library.
- Am I affected by CVE-2026-116882?
- Check whether you run Semantic MediaWiki at an affected version. Junglewise does that check for you around the clock: connect your code, cloud and domains, and it matches new vulnerabilities like this one against what you actually run and tells you when one reaches you.
How to fix
- Fixed in: 7.3.1
Restrict the FacetedSearch profile and schema editing permissions to trusted administrators only. Consider disabling FacetedSearch if not in active use until an upgrade is available.
Technical details
A stored XSS vulnerability exists in the FacetedSearch component where exploration-link labels are passed unescaped from the profile schema through ExploreListBuilder::buildHTML() to Html::rawElement(). An authenticated user with FacetedSearch profile or schema editing permissions can inject arbitrary HTML/JavaScript into the label field, which persists in the schema and executes in viewers' browsers when the Special:FacetedSearch page is accessed. The vulnerability requires high privileges (profile/schema editor) and user interaction (victim viewing the page).
Affected products
- Semantic MediaWiki Semantic MediaWiki 4.2.0 through 7.3.0
Timeline
- 2026-09-28: disclosed
- 2026-10-27: advisory