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CVE-2026-103921 Details

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.

Metrics

CVSS 3.x Severity and Vector Strings:

CNA: [email protected]CVSS-B:7.4 HIGHVector:CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N

References to Advisories, Solutions, and Tools

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URL	Source(s)	Tag(s)
https://github.com/ardatan/graphql-tools/commit/3831a0661514c91d99971052f983552556880402	[email protected]
https://github.com/ardatan/graphql-tools/pull/8426	[email protected]
https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/[email protected]	[email protected]
https://github.com/ardatan/graphql-tools/security/advisories/GHSA-6fw5-9hq8-w87g	[email protected]

Weakness Enumeration

CWE-ID	CWE Name	Source
CWE-295	Improper Certificate Validation	[email protected]

Affected Products

No affected product data is available for this CVE.

Change History

2 change records found show changes

Date	Action	Recorded By
Oct 1, 2026	CVE Modified	CISA-ADP
Oct 1, 2026	New CVE Received	[email protected]