strawberry-graphql up to 0.326.0 PermissionExtension PermissionExtension.resolve improper authorization

Summaryinfo

A vulnerability, which was classified as problematic, was found in strawberry-graphql up to 0.326.0. This affects the function PermissionExtension.resolve of the component PermissionExtension. Such manipulation leads to improper authorization. This vulnerability is documented as CVE-2026-107728. The attack can be executed remotely. There is not any exploit available. You should upgrade the affected component.

Detailsinfo

A vulnerability, which was classified as problematic, has been found in strawberry-graphql up to 0.326.0. Affected by this issue is the function PermissionExtension.resolve of the component PermissionExtension. The manipulation with an unknown input leads to a improper authorization vulnerability. Using CWE to declare the problem leads to CWE-285. The product does not perform or incorrectly performs an authorization check when an actor attempts to access a resource or perform an action. Impacted is confidentiality. CVE summarizes:

Strawberry GraphQL is a library for creating GraphQL APIs. From 0.217.0 until 0.326.1, PermissionExtension.resolve() on a synchronous field resolver evaluates the result of has_permission() for truthiness. When a custom permission declares has_permission() as a normal function but returns an awaitable, supports_sync does not classify it as asynchronous, the awaitable is not awaited, and its inherently truthy object value permits the protected resolver to run even when the result would resolve to false. This affects synchronous field resolvers under both execute_sync() and execute(); permissions declared with async def has_permission() and synchronous permissions returning a boolean are not affected. This issue is fixed in version 0.326.1.

The advisory is shared for download at github.com. This vulnerability is handled as CVE-2026-107728 since 10/08/2026. 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. The MITRE ATT&CK project declares the attack technique as T1548.002.

Upgrading to version 0.326.1 eliminates this vulnerability.

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Productinfo

Name

• strawberry-graphql

Version

• 0.326

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CPE 2.2info

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