# CVE-2026-116884: SemanticMediaWiki stored cross-site scripting in tooltip module

Source: https://junglewise.ai/threats/cve-2026-116884-semanticmediawiki-from-5-0-0-before-7-3-1-contains-a-stored  
Publisher: Junglewise Threat Intelligence, https://junglewise.ai/threats  
Published: 2026-10-27. Updated: 2026-10-27  
License: CC BY 4.0 with a link back

CVE-2026-116884 · Severity: medium · CVSS 6.1 · Published 2026-10-27

SemanticMediaWiki is a data organization extension for MediaWiki. Editors can inject malicious code into wiki pages that executes in the browsers of anyone viewing those pages, including administrators, by adding specially crafted hover tooltips. An attacker can steal session tokens, modify pages, or impersonate users through this vulnerability.

Technologies: [SemanticMediaWiki](https://junglewise.ai/threats/technologies/semanticmediawiki). Vendors: [SemanticMediaWiki](https://junglewise.ai/threats/vendors/semanticmediawiki).

## Quick answers

**Is CVE-2026-116884 exploited in the wild?** No. Junglewise Threat Intelligence has no report of CVE-2026-116884 being exploited in the wild.

**How severe is CVE-2026-116884?** Medium severity, with a CVSS score of 6.1, published 27 October 2026.

**Which products and versions are affected?** SemanticMediaWiki 5.0.0 to before 7.3.1.

**Is there a fix for CVE-2026-116884?** Yes: fixed in 7.3.1. Junglewise finds every place you run it, drafts the upgrade and applies it once you approve.

**How is CVE-2026-116884 attacked?** It is attacked over the network, in a software library.

**Am I affected by CVE-2026-116884?** Check whether you run SemanticMediaWiki 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

## Technical details

A stored XSS vulnerability exists in ext.smw.tooltip.tippy.js where five wikitext-authorable data-* attributes (data-content, data-title, data-top, data-bottom, data-theme) on .smw-highlighter spans are concatenated without escaping and passed to tippy's setContent() with allowHTML enabled, routing them to innerHTML. Non-reserved data-* attributes survive the MediaWiki Sanitizer entity-encoded; when a viewer hovers the element, getAttribute() returns the decoded string which is then executed as HTML/JavaScript in their authenticated context.

## Affected products

- SemanticMediaWiki SemanticMediaWiki 5.0.0 to before 7.3.1

## Timeline

- 2026-09-28: disclosed
- 2026-10-27: advisory

## References

- [https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-4wj6-wmjp-pmhh](https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-4wj6-wmjp-pmhh)
- [https://www.vulncheck.com/advisories/semanticmediawiki-5.0.0-before-7.3.1-stored-xss-via-tooltip-module-data-attributes](https://www.vulncheck.com/advisories/semanticmediawiki-5.0.0-before-7.3.1-stored-xss-via-tooltip-module-data-attributes)

## Related threats

- [SemanticMediaWiki reflected XSS in extended search profile](https://junglewise.ai/threats/cve-2026-116892-semanticmediawiki-from-3-1-0-before-7-3-1-contains-a-reflected)
- [SemanticMediaWiki reflected XSS in Special:FacetedSearch](https://junglewise.ai/threats/cve-2026-116891-semanticmediawiki-from-4-2-0-before-7-2-1-contains-a-reflected)
- [SemanticMediaWiki reflected XSS in Special:Ask separator parameters](https://junglewise.ai/threats/cve-2026-116875-semanticmediawiki-from-3-0-0-before-7-3-1-contains-a-reflected)
- [SemanticMediaWiki reflected XSS in JsonResultPrinter](https://junglewise.ai/threats/cve-2026-116874-semanticmediawiki-from-3-1-0-before-7-3-1-contains-a-reflected)