Disclosure summary
GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to 1.1.35, the executor-legacy-ws buildWSLegacyExecutor() function hardcodes TLS certificate rejection off for Node.js connections to wss:// endpoints. Applications using the executor directly, or url-loader with SubscriptionProtocol.LEGACY_WS, can therefore accept an attacker-controlled certificate when a network-positioned attacker intercepts the connection. Authentication material in connectionParams or headers can be disclosed, and subscription data can be modified. Browser WebSocket clients are unaffected because browsers enforce certificate validation. This issue is fixed in version 1.1.35.
Source-reported weakness categories
CWE-295
Source-specific records & product guidance
Sources retain their own attribution and scoring. Follow the original record to confirm affected versions, fixed releases, and configuration conditions.
GitHub Reviewed Security Advisories · GHSA-6fw5-9hq8-w87g
Open original source · Updated Oct 05, 2026
GraphQL Tools: TLS Certificate Validation Disabled in Legacy GraphQL WebSocket Executor
Source severity: HIGH / 0
| Ecosystem | Package | Affected range | First patched |
|---|---|---|---|
| npm | @graphql-tools/executor-legacy-ws | 1.1.35 |
NIST National Vulnerability Database · NVD-CVE-2026-103921
Open original source · Updated Oct 02, 2026
Only CPE matches marked vulnerable=true are indexed. AND/OR platform conditions must be checked in the original NVD record.
Original records & references
PUBLISHED 2026-10-01T13:17:19-04:00
MODIFIED 2026-10-02T14:44:45-04:00
INGESTED 2026-10-06T11:45:14-04:00