---
id: CVE-2026-107728
title: Strawberry GraphQL is a library for creating GraphQL APIs
summary: >-
  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 declar…
severity: high
cvss: 7.5
cvssVector: 'CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N'
cwe:
  - CWE-863
published: '2026-10-08'
updated: '2026-10-08'
sourceUpdated: '2026-10-08T23:16:58.180'
source: NVD
sourceUrl: 'https://nvd.nist.gov/vuln/detail/CVE-2026-107728'
references:
  - url: >-
      https://github.com/strawberry-graphql/strawberry/commit/2ebb79796c0e5ebb43cae1abd2b5a21363b1c00e
    label: security-advisories@github.com
  - url: 'https://github.com/strawberry-graphql/strawberry/pull/4605'
    label: security-advisories@github.com
  - url: 'https://github.com/strawberry-graphql/strawberry/releases/tag/0.326.1'
    label: security-advisories@github.com
  - url: >-
      https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-pfvf-fwfp-25mp
    label: security-advisories@github.com
tags:
  - nvd
ingestedAt: '2026-10-09T00:19:50.969Z'
---

## Overview

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.

## Remediation

Refer to the linked advisories for vendor-supplied fixes and affected version ranges.