Insufficient Session Expiration Affecting @graphql-tools/executor-legacy-ws package, versions <1.1.36
Threat Intelligence
Snyk has a proof-of-concept or detailed explanation of how to exploit this vulnerability.
The probability is the direct output of the EPSS model, and conveys an overall sense of the threat of exploitation in the wild. The percentile measures the EPSS probability relative to all known EPSS scores. Note: This data is updated daily, relying on the latest available EPSS model version. Check out the EPSS documentation for more details.
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Start learning- Snyk IDSNYK-JS-GRAPHQLTOOLSEXECUTORLEGACYWS-21802761
- published29 Oct 2026
- disclosed28 Oct 2026
- creditUnknown
Introduced: 28 Oct 2026
NewCVE-2026-118665 (opens in a new tab)How to fix?
Upgrade @graphql-tools/executor-legacy-ws to version 1.1.36 or higher.
Overview
@graphql-tools/executor-legacy-ws is an A set of utils for faster development of GraphQL tools
Affected versions of this package are vulnerable to Insufficient Session Expiration via the shared executorConnectionParams closure in buildWSLegacyExecutor, where connection parameters supplied by one caller via extensions.connectionParams are merged into a module-level object and never cleared between requests. A subsequent caller using the same executor instance inherits the previous caller's credentials, including bearer tokens, in the connection_init payload sent over the new WebSocket connection. Additionally, data frames are routed without checking the operation ID, so a later caller can receive subscription payloads intended for an earlier caller.