---
id: "CVE-2026-126561"
page: "https://infrastack.ai/live/CVE-2026-126561"
kind: "vulnerability"
aliases: ["CVE-2026-126561"]
title: "Semantic MediaWiki: editors can lock pages without edit-protection rights"
severity: "high"
cvss: 7.1
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["mediawiki", "package", "self-hosted", "semantic-mediawiki"]
not_affected_if: ["not-installed", "trusted-editors-only"]
published_at: "2026-11-11T03:16:50+00:00"
first_seen_at: "2026-11-11T03:24:59+00:00"
updated_at: "2026-11-11T03:26:21+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-126561", "first_seen_at": "2026-11-11T03:24:59+00:00"}]
exploit_sources: []
---

# Semantic MediaWiki: editors can lock pages without edit-protection rights

Link for people: https://infrastack.ai/live/CVE-2026-126561 (this .md is for agents)

Semantic MediaWiki before 7.4.1 lets an editor without the edit-protection right add an Is edit protected annotation to a page. The page then blocks other editors and administrators from editing, moving or deleting it, indefinitely.

_Summary, check and fix written by a model from the sources; labelled as such._

## How to check

- Check the installed Semantic MediaWiki version in Special:Version or the extension's composer.json; `7.4.1` or later is not affected.
- Look for the Is edit protected property used on pages or in templates.

## Fix

- Semantic MediaWiki: move to `7.4.1` or later.

## Timeline

- 2026-11-11T03:24:59+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-126561

## Documents

- [advisory] Vendor advisory: github.com https://github.com/SemanticMediaWiki/SemanticMediaWiki/security/advisories/GHSA-9w3p-9m8x-j2mw
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/semantic-mediawiki-2.5.0-before-7.4.1-missing-authorization-via-is-edit-protected-annotation
- [fix] Patch: github.com https://github.com/SemanticMediaWiki/SemanticMediaWiki/commit/ca81329c74aa64077f367e02ad00c079458ef10a
- [fix] Release notes: github.com https://github.com/SemanticMediaWiki/SemanticMediaWiki/releases/tag/7.4.1

## From the sources

Semantic MediaWiki 2.5.0 before 7.4.1 contains a missing authorization vulnerability that allows editors without the edit-protection right to lock pages by adding an Is edit protected annotation. Attackers can add [[Is edit protected::true]] to pages or #set it in widely transcluded templates, so the TitleQuickPermissions hook blocks other editors and administrators from editing, moving or deleting them indefinitely.

---

_Free to read, with fair use of about 60 pages a minute. For higher limits or API access: sales@infrastack.ai_