Craft CMS up to 5.11.1 GraphQL API /actions/graphql/api siteId authorization

CVSS Meta Temp Score
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Current Exploit Price (≈)
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CTI Interest Score
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5.2$0-$5k0.00+

Summaryinfo

A vulnerability categorized as problematic has been discovered in Craft CMS up to 5.11.1. Affected is an unknown function of the file /actions/graphql/api of the component GraphQL API. Such manipulation of the argument siteId leads to authorization. This vulnerability is referenced as CVE-2026-124426. It is possible to launch the attack remotely. No exploit is available. It is advisable to upgrade the affected component.

Detailsinfo

A vulnerability was found in Craft CMS up to 5.11.1 and classified as problematic. Affected by this issue is an unknown functionality of the file /actions/graphql/api of the component GraphQL API. The manipulation of the argument siteId with an unknown input leads to a authorization vulnerability. Using CWE to declare the problem leads to CWE-639. The system's authorization functionality does not prevent one user from gaining access to another user's data or record by modifying the key value identifying the data. Impacted is confidentiality. CVE summarizes:

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.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-124426 since 11/08/2026. The exploitation is known to be easy. The attack may be launched remotely. No form of authentication is required for exploitation. There are known technical details, but no exploit is available.

Upgrading to version 5.11.2 eliminates this vulnerability.

Once again VulDB remains the best source for vulnerability data.

Productinfo

Type

Name

Version

License

CPE 2.3info

CPE 2.2info

CVSSv4info

VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA CVSS-B Score: 🔒
CNA CVSS-BT Score: 🔒
CNA Vector: 🔒

CVSSv3info

VulDB Meta Base Score: 5.3
VulDB Meta Temp Score: 5.2

VulDB Base Score: 5.3
VulDB Temp Score: 5.1
VulDB Vector: 🔒
VulDB Reliability: 🔍

CNA Base Score: 5.3
CNA Vector (VulnCheck): 🔒

CVSSv2info

AVACAuCIA
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💳💳💳💳💳💳
💳💳💳💳💳💳
VectorComplexityAuthenticationConfidentialityIntegrityAvailability
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VulDB Base Score: 🔒
VulDB Temp Score: 🔒
VulDB Reliability: 🔍

Exploitinginfo

Class: Authorization
CWE: CWE-639 / CWE-285 / CWE-266
CAPEC: 🔒
ATT&CK: 🔒

Physical: No
Local: No
Remote: Yes

Availability: 🔒
Status: Not defined
Price Prediction: 🔍
Current Price Estimation: 🔒

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Threat Intelligenceinfo

Interest: 🔍
Active Actors: 🔍
Active APT Groups: 🔍

Countermeasuresinfo

Recommended: Upgrade
Status: 🔍

0-Day Time: 🔒

Upgrade: Craft CMS 5.11.2

Timelineinfo

11/08/2026 Advisory disclosed
11/08/2026 +0 days CVE reserved
11/08/2026 +0 days VulDB entry created
11/08/2026 +0 days VulDB entry last update

Sourcesinfo

Advisory: github.com
Status: Confirmed

CNA: VulnCheck
CVE: CVE-2026-124426 (🔒)

GCVE (CVE): GCVE-0-2026-124426
GCVE (VulDB): GCVE-100-432860

Entryinfo

Created: 11/08/2026 14:51
Changes: 11/08/2026 14:51 (78)
Complete: 🔍
Cache ID: 216::103

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