CVE-2026-35523— Authentication bypass in strawberry-graphql via legacy graphql-ws WebSocket subprotocol
Quick assessment
Affected
strawberry-graphql strawberry
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
Strawberry GraphQL是Strawberry GraphQL开源的一个利用类型注释的 Python GraphQL 库。 Strawberry GraphQL 0.312.3之前版本存在访问控制错误漏洞，该漏洞源于WebSocket订阅端点身份验证绕过，可能导致远程攻击者通过graphql-ws子协议跳过身份验证钩子。
Possible ATT&CK Techniques 1 AI
T1190 · Exploit Public-Facing Application
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I. Basic Information for CVE-2026-35523
Vulnerability Information
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Vulnerability Title
Authentication bypass in strawberry-graphql via legacy graphql-ws WebSocket subprotocol
Source: CVE Program / CVE List V5
Vulnerability Description
Strawberry GraphQL is a library for creating GraphQL APIs. Strawberry up until version 0.312.3 is vulnerable to an authentication bypass on WebSocket subscription endpoints. The legacy graphql-ws subprotocol handler does not verify that a connection_init handshake has been completed before processing start (subscription) messages. This allows a remote attacker to skip the on_ws_connect authentication hook entirely by connecting with the graphql-ws subprotocol and sending a start message directly, without ever sending connection_init. This vulnerability is fixed in 0.312.3.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:N/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5
Vulnerability Title
Strawberry GraphQL 访问控制错误漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
Strawberry GraphQL是Strawberry GraphQL开源的一个利用类型注释的 Python GraphQL 库。 Strawberry GraphQL 0.312.3之前版本存在访问控制错误漏洞，该漏洞源于WebSocket订阅端点身份验证绕过，可能导致远程攻击者通过graphql-ws子协议跳过身份验证钩子。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| strawberry-graphql | strawberry | < 0.312.3 | - |
|
II. Public POCs for CVE-2026-35523
| # | POC Description | Source Link | Shenlong Link |
|---|
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IV. Related Vulnerabilities
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Same vendor: strawberry-graphql
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Same weakness: CWE-306
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V. Comments for CVE-2026-35523
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