CVE-2026-103921: CWE-295: Improper Certificate Validation in ardatan graphql-tools
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.
CVE-2026-103921: CWE-295: Improper Certificate Validation in ardatan graphql-tools
Description
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 v3.1
Score 7.4high
Affected software
ardatan
graphql-tools
@graphql-tools
executor-legacy-ws
Weaknesses
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- GitHub_M
- Date Reserved
- 2026-10-01T14:20:19.154Z
- Cvss Version
- 3.1
- State
- PUBLISHED
Threat ID: 6abe8eaaa43b0b3b89cc07e8
Added to database: 10/01/2026, 16:47:38 UTC
Last updated: 10/01/2026, 16:47:38 UTC
Views: 1
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