Vulnerability details
CVE-2026-103921
GraphQL Tools: TLS Certificate Validation Disabled in Legacy GraphQL WebSocket Executor
Official 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 scores
| Score | Version | Source | Vector |
|---|---|---|---|
| 7.4High | 3.1 | CVEProject cvelistV5 (CNA) (GitHub_M) | CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N |
Affected products
| Vendor | Product | Versions | Source |
|---|---|---|---|
| @graphql-tools | executor-legacy-ws | < 1.1.35 | CVEProject cvelistV5 (CNA) |
| ardatan | graphql-tools | < 1.1.35 | CVEProject cvelistV5 (CNA) |
References and advisories
4- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-6fw5-9hq8-w87g x_refsource_CONFIRM
- https://github.com/ardatan/graphql-tools/pull/8426 x_refsource_MISC
- https://github.com/ardatan/graphql-tools/commit/3831a0661514c91d99971052f983552556880402 x_refsource_MISC
- https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-legacy-ws@1.1.35 x_refsource_MISC
Details
- Published
- 2026-10-01
- Last updated
- 2026-10-01
- State
- Published
- Assigner (CNA)
- GitHub_M
Exploit prediction (EPSS)
SSVC assessment (CISA)
- Automatable
- No
- Exploitation
- None
- Technical impact
- Total
Weaknesses (CWE)
- CWE-295Improper Certificate Validation