CVE-2026-35523

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.

The following products are affected by CVE-2026-35523 vulnerability.

Here, you will find a curated list of external links that provide in-depth information to CVE-2026-35523.

URL	Resource
https://github.com/strawberry-graphql/strawberry/security/advisories/GHSA-vpwc-v33q-mq89