---
id: "CVE-2026-124426"
page: "https://infrastack.ai/live/CVE-2026-124426"
kind: "vulnerability"
aliases: ["CVE-2026-124426"]
title: "Craft CMS: unauthenticated GraphQL request reads content from out-of-scope sites"
severity: "medium"
cvss: 6.9
epss: null
exploited: false
status: "open"
category: "package"
products: []
ecosystems: []
tags: ["craft-cms", "graphql", "package", "php", "self-hosted"]
not_affected_if: ["no-public-graphql", "not-craft-5"]
published_at: "2026-11-08T14:18:08+00:00"
first_seen_at: "2026-11-08T14:48:38+00:00"
updated_at: "2026-11-08T14:50:53+00:00"
sources: [{"source": "nvd", "url": "https://nvd.nist.gov/vuln/detail/CVE-2026-124426", "first_seen_at": "2026-11-08T14:48:38+00:00"}]
exploit_sources: []
---

# Craft CMS: unauthenticated GraphQL request reads content from out-of-scope sites

Link for people: https://infrastack.ai/live/CVE-2026-124426 (this .md is for agents)

Craft CMS 5.0.0 before 5.11.2 fails to enforce a GraphQL schema's Sites scope when the localized field is requested without a siteId argument. An unauthenticated attacker can send a POST to /actions/graphql/api and read content from sites outside that scope.

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

## How to check

- Check the installed Craft CMS version in composer.lock or with `composer show craftcms/cms`
- Look for a public GraphQL endpoint at /actions/graphql/api on the site

## Fix

- Craft CMS: `5.11.2` or later

## Timeline

- 2026-11-08T14:48:38+00:00 nvd https://nvd.nist.gov/vuln/detail/CVE-2026-124426

## Documents

- [advisory] Vendor advisory: github.com https://github.com/craftcms/cms/security/advisories/GHSA-mp59-9rf5-93wr
- [advisory] Third-party advisory: www.vulncheck.com https://www.vulncheck.com/advisories/craft-cms-before-5.11.2-graphql-sites-scope-bypass-via-localized-field

## From the sources

Craft CMS from 5.0.0 before 5.11.2 contains an authorization bypass vulnerability that allows unauthenticated attackers to read content from sites outside a GraphQL schema's Sites scope. Attackers can send a POST request to /actions/graphql/api selecting the localized field without the siteId argument to disclose out-of-scope site content.

---

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