CVE-2026-124426
Received Received - Intake

Authorization Bypass in Craft CMS via GraphQL API

Publication date: 2026-11-08

Last updated on: 2026-11-08

Assigner: VulnCheck

Description
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.

CVSS Scores

EPSS Scores

Probability:
Percentile:

Meta Information

Published
2026-11-08
Last Modified
2026-11-08
Generated
2026-11-08
AI Q&A
2026-11-08
EPSS Evaluated
N/A
NVD
CVE-2026-124426
EUVD
EUVD-2026-119574

Affected Vendors & Products

Showing 1 associated CPE
Vendor Product Version / Range
craftcms craft_cms From 5.0.0 (inc) to 5.11.2 (exc)

Helpful Resources

Exploitability

CWE
CWE Icon
KEV
KEV Icon
CWE ID Description
CWE-862 The product does not perform an authorization check when an actor attempts to access a resource or perform an action.

Attack-Flow Graph

AI Quick Actions

Instant insights powered by AI
Executive Summary

CVE-2026-124426 is an authorization bypass vulnerability in Craft CMS versions 5.0.0 to 5.11.1. It allows unauthenticated attackers to read content from sites outside a GraphQL schema's Sites scope by sending a POST request to /actions/graphql/api without the siteId argument when querying a localized field.

Detection Guidance

To detect this vulnerability, check Craft CMS versions before 5.11.2. Send a POST request to /actions/graphql/api with a localized field query omitting the siteId argument. If out-of-scope site content is returned, the system is vulnerable.

Impact Analysis

This vulnerability enables attackers to access restricted site content without authentication, potentially exposing sensitive data. It requires a multi-site Craft CMS installation with at least two sites and a GraphQL schema excluding at least one site.

Compliance Impact

This vulnerability could lead to unauthorized data exposure, violating compliance requirements like GDPR (data protection) and HIPAA (health information privacy) by allowing access to restricted content without proper authorization.

Mitigation Strategies

Upgrade Craft CMS to version 5.11.2 or later immediately. If upgrading is not possible, restrict access to the /actions/graphql/api endpoint and ensure GraphQL schemas enforce siteId arguments for localized fields.

Chat Assistant

Ask questions about this CVE
Hi! I’m here to help you understand CVE-2026-124426. Ask me anything about the vulnerability, its impact, or mitigation strategies.
0/70

EPSS Chart

Security Radar

News mentioning this vulnerability
Loading related security news...