GHSA-434m-5hcj-pxf3 - GraphQL Tools: Per-request connection parameters persist into later users' WebSocket authentications

# Stale authentication state in `@graphql-tools/executor-legacy-ws`: per-request `extensions.connectionParams` persist in executor closure state and are replayed in a later caller's `connection_init` ## Report metadata | Field | Value | | --- | --- | | Package | `@graphql-tools/executor-legacy-ws` (npm, `pkg:npm/%40graphql-tools/executor-legacy-ws`) | | Repository | https://github.com/ardatan/graphql-tools | | Component | `buildWSLegacyExecutor` (`packages/executors/legacy-ws/src/index.ts`) | | Vulnerability class | Stale authentication state / credential reuse across requests | | Verified against | Commit `b5d1c36ebb8ed3868260ffee5bbcbb423ad5c1f1`; npm release `1.1.33` installed and exercised. During validation the same behaviour was also observed on the current latest release `1.1.35`, and the unreset closure is still present on `master`. | | API surface | Public documented API (`buildWSLegacyExecutor`, and `request.extensions.connectionParams` on the returned executor) | | Affected in default configuration | Yes — the factory returns a general, reusable `Executor` with no per-identity or single-use restriction, and no supported teardown clears the retained parameters. | Version note: the originally recorded affected range was `<= 1.1.33`. Validation showed that range understates exposure — the same proof of concept leaks identically on `1.1.35`. ## Summary `buildWSLegacyExecutor` keeps a single closure-scoped object, `executorConnectionParams`, for the lifetime of the executor. Every execution that carries `request.extensions.connectionParams` merges those keys into that object with `Object.assign`, and the object is merged into the `connection_init` payload each time a new WebSocket opens. Nothing ever removes keys: `cleanupWebsocket` terminates the socket and nulls the handle but leaves `executorConnectionParams` intact, and a later request that simply omits a key skips the conditional update entirely. The consumer-side shape is a shared executor that for