# CVE-2026-103585 — The Wikimedia Foundation MediaWiki MediaSearch extension

> As of 2026-10-01, CVE-2026-103585 is a Low-severity (band derived from the CVSS v4.0 score, not stated by the CNA) vulnerability in The Wikimedia Foundation MediaWiki MediaSearch extension, CVSS v4.0 1.2. No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-103585 as of 2026-10-01; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-10-01

## What is CVE-2026-103585?

Improper neutralization of Script-Related HTML tags in a web page (basic XSS) vulnerability in The Wikimedia Foundation MediaWiki MediaSearch extension allows Cross-Site Scripting (XSS). This issue affects MediaWiki MediaSearch extension: 1.46, 1.45, and 1.43.

The record classifies CVE-2026-103585 under weakness class [CWE-80](https://cwe.mitre.org/data/definitions/80.html). 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 5 days ago.

## Severity and exploitation probability

- **CVSS v4.0 base score:** 1.2 — Low (derived from score) (`CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:L/VI:L/VA:L/SC:L/SI:L/SA:L/E:P/S:N/AU:Y/R:U/V:D/RE:M/U:Amber`)
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.6/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-30, last modified 2026-10-01

## Is CVE-2026-103585 being exploited?

Weaponised exploit code for CVE-2026-103585 is publicly available. 1 public proof-of-concept repository is tracked for this identifier. It currently carries a trending score of 38 in the Threadlinqs vulnerability feed.

- [BomboBombone/CVE-2026-103585](https://github.com/BomboBombone/CVE-2026-103585) (github)

## Affected products and versions

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

## How to fix CVE-2026-103585

No vendor patch reference has been recorded for CVE-2026-103585 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-2026-103585

No threat campaign in the Threadlinqs corpus currently references CVE-2026-103585, 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, public proof-of-concept repositories, GitHub Security Advisories. Last verified by Threadlinqs on 2026-10-01.

**Other references**

- [phabricator.wikimedia.org](https://phabricator.wikimedia.org/T435999)
- [gerrit.wikimedia.org](https://gerrit.wikimedia.org/r/q/I79e8200289bd120c3c971ba830776eaae779bb99)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-103585
Full detection coverage and IOCs for threats exploiting CVE-2026-103585 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp