# CVE-2026-103047 — The Wikimedia Foundation Mediawiki - CentralAuth extension

> As of 2026-09-30, CVE-2026-103047 is a MEDIUM-severity vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth extension, CVSS v3.1 6.1. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-103047 as of 2026-09-30; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-30

## What is CVE-2026-103047?

Improper neutralization of input during web page generation ('cross-site scripting') vulnerability in The Wikimedia Foundation Mediawiki - CentralAuth extension allows Stored XSS. This issue affects Mediawiki - CentralAuth extension: before 1.46.1, 1.45.5, 1.43.10.

The record classifies CVE-2026-103047 under weakness class [CWE-79](https://intel.threadlinqs.com/cwe/CWE-79). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs no prior authentication, needs a user to take an action first. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 6 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 6.1 — MEDIUM (`CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:C/C:L/I:L/A:N`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 3.1/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-29, last modified 2026-09-30

## Is CVE-2026-103047 being exploited?

It currently carries a trending score of 30 in the Threadlinqs vulnerability feed.

## Affected products and versions

- [The Wikimedia Foundation](https://intel.threadlinqs.com/vendors/the-wikimedia-foundation): Mediawiki - CentralAuth extension

## How to fix CVE-2026-103047

No vendor patch reference has been recorded for CVE-2026-103047 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-103047

No threat campaign in the Threadlinqs corpus currently references CVE-2026-103047, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, NVD. Last verified by Threadlinqs on 2026-09-30. This product uses the NVD API but is not endorsed or certified by the NVD.

**Vendor advisory and patch**

- [gerrit.wikimedia.org — mitigation](https://gerrit.wikimedia.org/r/c/1309285)

**Issue tracking and product pages**

- [phabricator.wikimedia.org — issue tracking](https://phabricator.wikimedia.org/T244682)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-103047
Full detection coverage and IOCs for threats exploiting CVE-2026-103047 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp