Craft CMS up to 4.18.8/5.11.1 GraphQL sql injection

Summaryinfo

A vulnerability marked as critical has been reported in Craft CMS up to 4.18.8/5.11.1. This affects an unknown function of the component GraphQL. Performing a manipulation results in sql injection. This vulnerability is reported as CVE-2026-123491. The attack is possible to be carried out remotely. No exploit exists. It is suggested to upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as critical, was found in Craft CMS up to 4.18.8/5.11.1. This affects an unknown code of the component GraphQL. The manipulation with an unknown input leads to a sql injection vulnerability. CWE is classifying the issue as CWE-89. The product constructs all or part of an SQL command using externally-influenced input from an upstream component, but it does not neutralize or incorrectly neutralizes special elements that could modify the intended SQL command when it is sent to a downstream component. Without sufficient removal or quoting of SQL syntax in user-controllable inputs, the generated SQL query can cause those inputs to be interpreted as SQL instead of ordinary user data. This is going to have an impact on confidentiality, integrity, and availability. The summary by CVE is:

Craft CMS 4.0.0 before 4.18.9 and 5.0.0 before 5.11.2 contains an SQL injection vulnerability in GraphQL eager-loading: arguments on eager-loadable nodes absent from the public schema are copied into EagerLoadPlan criteria without cleansing. Unauthenticated attackers can supply a parenthesized select argument to inject SQL expressions and read arbitrary database content, including password hashes and session tokens.

It is possible to read the advisory at github.com. This vulnerability is uniquely identified as CVE-2026-123491 since 11/06/2026. The exploitability is told to be easy. It is possible to initiate the attack remotely. No form of authentication is needed for exploitation. The technical details are unknown and an exploit is not publicly available. The attack technique deployed by this issue is T1505 according to MITRE ATT&CK.

Upgrading to version 4.18.9 or 5.11.2 eliminates this vulnerability.

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Productinfo

Type

• Content Management System

Name

• Craft CMS

Version

• 4.18.0
• 4.18.1
• 4.18.2
• 4.18.3
• 4.18.4
• 4.18.5
• 4.18.6
• 4.18.7
• 4.18.8
• 5.11.0
• 5.11.1

License

• free

CPE 2.3info

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CPE 2.2info

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Be aware that VulDB is the high quality source for vulnerability data.

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