{"cve":"CVE-2026-103921","nvd":{"published":"2026-10-01T17:17:19.390","modified":"2026-10-02T18:44:45.660","status":"Awaiting Analysis","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_v4":null,"cvss_v3":{"version":"3.1","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4},"cwes":["CWE-295"],"references":["https://github.com/ardatan/graphql-tools/commit/3831a0661514c91d99971052f983552556880402","https://github.com/ardatan/graphql-tools/pull/8426","https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-legacy-ws@1.1.35","https://github.com/ardatan/graphql-tools/security/advisories/GHSA-6fw5-9hq8-w87g"],"products":[],"source":"nvd","synced_at":"2026-10-19T22:57:46.668721662+00:00"},"epss":{"cve":"CVE-2026-103921","score":0.00274,"percentile":0.1954,"date":"2026-10-25"},"kev":null,"osv":[{"id":"GHSA-6fw5-9hq8-w87g","url":"https://osv.dev/vulnerability/GHSA-6fw5-9hq8-w87g","summary":"GraphQL Tools: TLS Certificate Validation Disabled in Legacy GraphQL WebSocket Executor","modified":"2026-10-05T23:15:03.996305160Z","packages":[{"ecosystem":"npm","name":"@graphql-tools/executor-legacy-ws","purl":"pkg:npm/%40graphql-tools/executor-legacy-ws","ranges":["<1.1.35"],"fixed":["1.1.35"]}]}],"attribution":["This product uses the NVD API but is not endorsed or certified by the NVD.","EPSS scores: FIRST Exploit Prediction Scoring System, https://www.first.org/epss","Known exploited vulnerabilities: CISA Known Exploited Vulnerabilities Catalog, https://www.cisa.gov/known-exploited-vulnerabilities-catalog","Package advisories: OSV (https://osv.dev), from the GitHub Advisory Database, PyPA, Go, RustSec and other ecosystem databases, under CC-BY 4.0 or CC0","CVE records: the CVE Program's CVE List (https://www.cve.org), under its terms of use (https://www.cve.org/Legal/TermsOfUse). CVE is a registered trademark of The MITRE Corporation; this product is not affiliated with the CVE Program."]}