Vulnerability Description
GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to version 1.1.36 of the GraphQL Tools legacy WebSocket executor package, buildWSLegacyExecutor in packages/executors/legacy-ws/src/index.ts retains request.extensions.connectionParams in the closure-scoped executorConnectionParams object after cleanupWebsocket closes a connection. When one executor is reused across different authorization contexts, a later request that omits a sensitive key can send an earlier caller's Authorization or tenant value in its connection_init payload, causing the downstream server to authenticate the later caller as the earlier user. Applications that create a new executor for every request are not affected. This issue is fixed in version 1.1.36 of the GraphQL Tools legacy WebSocket executor package.
Related Weaknesses (CWE)
References
- https://github.com/ardatan/graphql-tools/commit/c2f226e6f68236be9e4a577f29faeaa9
- https://github.com/ardatan/graphql-tools/pull/8480
- https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-le
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-434m-5hcj-pxf3
FAQ
What is CVE-2026-118665?
CVE-2026-118665 is a documented vulnerability. GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to version 1.1.36 of the GraphQL Tools legacy WebSocket executor package, buildWSLegacyExecutor in packages...
How severe is CVE-2026-118665?
CVSS scoring is not yet available for CVE-2026-118665. Check NVD for updates.
Is there a patch for CVE-2026-118665?
Check the references section above for vendor advisories and patch information. Review vendor security bulletins for remediation guidance.