CVE-2026-92594 in Craft CMS
Summary
by MITRE • 09/17/2026
Craft CMS 5.0.0-RC1 through versions before 5.11.0 incorrectly authorize the GraphQL draftCreator and revisionCreator fields: instead of requiring the user-data scope enforced by Gql::canQueryUsers() (usergroups.*:read), these fields are gated only on the elements.drafts:read / elements.revisions:read scopes, and their resolver returns a raw User element whose email, username, fullName, and addresses fields have no per-field authorization. A client holding only the drafts or revisions scope — including an unauthenticated client when the operator has enabled the public GraphQL schema with those scopes — can therefore harvest the email addresses, usernames, full names, and postal addresses of all draft/revision creators (typically site editors and administrators). The issue is fixed in 5.11.0.
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Analysis
by VulDB Data Team • 09/17/2026
Craft CMS versions ranging from 5.0.0-RC1 up to but not including version 5.11.0 contain a critical authorization bypass vulnerability within its GraphQL API implementation, specifically affecting the draftCreator and revisionCreator fields. This flaw stems from an incorrect mapping of access control scopes that governs who can query these specific data points. The intended security model requires users or clients to possess the user-data scope, enforced via the Gql::canQueryUsers() function with permissions such as usergroups.*:read, to access sensitive user information. However, due to a misconfiguration in the permission logic, these fields are instead gated solely by the elements.drafts:read and elements.revisions:read scopes. This discrepancy creates a significant gap between the intended security posture and the actual enforcement mechanism, allowing entities with lower-level permissions to bypass higher-security checks designed to protect personally identifiable information.
The technical nature of this vulnerability involves improper authorization logic within the GraphQL resolvers for draft and revision metadata. When a client queries these fields, the system validates that the requester has permission to read drafts or revisions but fails to validate whether they have explicit permission to access user profile data associated with those entities. Consequently, the resolver returns a raw User element containing sensitive attributes including email addresses, usernames, full names, and postal addresses without applying any per-field authorization checks. This means that even if an application is configured to restrict general user data access, these specific fields remain exposed because they are treated as part of the draft or revision object rather than distinct user resources requiring separate validation.
The operational impact of this vulnerability is severe, particularly in environments where public GraphQL schemas are enabled with drafts and revisions read permissions. An unauthenticated attacker can exploit this flaw to harvest sensitive personal information from all users who have created drafts or revisions on the site, which typically includes site editors and administrators. This data leakage facilitates further attacks such as targeted phishing campaigns, credential stuffing using harvested email addresses, or social engineering efforts leveraging known usernames and full names. The exposure of postal addresses adds a layer of physical privacy risk, while the availability of internal usernames aids in lateral movement within compromised systems by providing valid login identifiers for brute-force or dictionary-based authentication attempts against other services that may share credentials.
This vulnerability aligns with CWE-269, which describes Improper Privilege Assignment, as the system grants privileges to access sensitive data based on insufficiently restrictive criteria. It also relates closely to CWE-862, Missing Authorization, because the application fails to enforce proper authorization checks for specific resources within a single request context. From an offensive security perspective, this behavior is consistent with ATT&CK technique T1078, Valid Accounts, as it allows attackers to gather information about valid user accounts without needing prior authentication credentials if public access is enabled. The flaw represents a classic case of over-privileged data exposure where the granularity of permission checks does not match the sensitivity level of the returned fields.
To mitigate this risk, organizations running affected versions must immediately upgrade Craft CMS to version 5.11.0 or later, which corrects the authorization logic by ensuring that access to draftCreator and revisionCreator fields requires the appropriate user-data scopes. Until an upgrade is performed, administrators should disable public GraphQL schema access if it was previously enabled for drafts and revisions, thereby preventing unauthenticated users from exploiting this flaw. Additionally, reviewing existing API clients and their assigned permissions can help identify any legitimate services that might have been granted excessive privileges due to this misconfiguration, allowing for a more granular adjustment of access controls once the software is updated.