CVE-2026-103921GraphQL Tools: TLS Certificate Validation Disabled in Legacy GraphQL WebSocket Executor
Updated under an hour ago ()
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It affects ardatan graphql-tools and 1 other product. Add what you run to find out whether that includes you.
EPSS puts the chance of exploitation in the next 30 days at 0.27%, higher than 18% of scored CVEs.
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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 (v3.1, CNA)CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N
- Weakness (CWE)
- CWE-295
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- 0.27% (percentile 18)
- Assigned by
- GitHub_M
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 1, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
ardatan graphql-tools ardatan:graphql_tools (from the name) | before 1.1.35 | CNA record |
@graphql-tools executor-legacy-ws graphql_tools:executor_legacy_ws (from the name) | before 1.1.35 | CNA record |
References
- https://github.com/ardatan/graphql-tools/security/advisories/GHSA-6fw5-9hq8-w87gx-refsource-confirm
- https://github.com/ardatan/graphql-tools/pull/8426x-refsource-misc
- https://github.com/ardatan/graphql-tools/commit/3831a0661514c91d99971052f983552556880402x-refsource-misc
- https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-legacy-ws@1.1.35x-refsource-misc
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.