CVE-2026-107728

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.