Auth bypass in Strawberry-Graphql Strawberry
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.
Vulnerability class: Broken Access Control
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N.
EPSS exploit prediction
No EPSS score from FIRST.org yet. New CVEs usually get one within a few days; no score means no signal yet, not low risk. How EPSS works.
Affected products
- Strawberry-Graphql Strawberry — versions >= 0.217.0, < 0.326.1
Weakness classification (CWE)
References
Frequently asked questions
- What is CVE-2026-107728?
- CVE-2026-107728 is a high-severity vulnerability in Strawberry-Graphql Strawberry, classified under Incorrect Authorization. CVSS score: 7.5/10. Published 2026-10-08.
- How severe is CVE-2026-107728?
- High severity. CVSS v3 base score is 7.5 out of 10.