CVE-2026-103921
CVE-2026-103921 · GraphQL Tools: TLS Certificate Validation Disabled in Legacy GraphQL WebSocket Executor
This page contains facts from public vulnerability sources. Check the original advisory before updating.
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.
CVSS 7.4 · High · EPSS 0.3% · Fix available
- Published
- Updated
Stack: node
Affected products and versions
graphql-tools
- Versions
- < 1.1.35: Affected
No fix published
executor-legacy-ws
- Versions
- < 1.1.35: Affected
No fix published
@graphql-tools/executor-legacy-ws npm
- Affected ranges
- SEMVER: < 1.1.35
Update to 1.1.35
Original sources
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-6fw5-9hq8-w87g
- https://github.com/ardatan/graphql-tools/pull/8426
- https://github.com/ardatan/graphql-tools/commit/3831a0661514c91d99971052f983552556880402
- https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/[email protected]
- https://nvd.nist.gov/vuln/detail/CVE-2026-103921