{"id":"CVE-2026-103921","revision":null,"records":[{"revision":"d88d36e1bae5427db38a852e583bb0f8","observedAt":"2026-10-23T15:48:27.903+00:00","statement":{"source":"cve-program","id":"CVE-2026-103921","aliases":[],"title":"GraphQL Tools: TLS Certificate Validation Disabled in Legacy GraphQL WebSocket Executor","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.","state":0,"publishedAt":"2026-10-01T16:32:37.865+00:00","modifiedAt":"2026-10-01T18:04:28.083+00:00","affected":[{"ecosystem":"Vendor product","name":"graphql-tools","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"ardatan\",\n                    \"product\": \"graphql-tools\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.1.35\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"},{"ecosystem":"Vendor product","name":"executor-legacy-ws","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"@graphql-tools\",\n                    \"product\": \"executor-legacy-ws\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 1.1.35\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 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,"severity":"HIGH"}],"references":["https://github.com/ardatan/graphql-tools/security/advisories/GHSA-6fw5-9hq8-w87g","https://github.com/ardatan/graphql-tools/pull/8426","https://github.com/ardatan/graphql-tools/commit/3831a0661514c91d99971052f983552556880402","https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-legacy-ws@1.1.35"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-103921","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-103921","identifiers":["CVE-2026-103921"]},"retained":false,"historicalAffected":[]},{"revision":"d69feac6afc24ac4a5b14f79c6c3783b","observedAt":"2026-11-11T05:29:55.125+00:00","statement":{"source":"euvd","id":"EUVD-2026-90922","aliases":["CVE-2026-103921","GHSA-6fw5-9hq8-w87g"],"title":"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:// endpoi…","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.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 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,"severity":null}],"references":["https://github.com/ardatan/graphql-tools/security/advisories/GHSA-6fw5-9hq8-w87g","https://github.com/ardatan/graphql-tools/pull/8426","https://github.com/ardatan/graphql-tools/commit/3831a0661514c91d99971052f983552556880402","https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-legacy-ws@1.1.35"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-90922","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 1, 2026, 4:32:37 PM","dateUpdated":"Oct 1, 2026, 6:04:28 PM"},"relatedAdvisories":[],"note":"EUVD source date text has no stated timezone and is retained without inventing a UTC instant. Related bulletin membership is not an alias, common cause or applicability claim. A missing vector with a zero score is treated as unrated. Complete vendor/product and underlying source evidence remains in the original JSON."},"key":"euvd:EUVD-2026-90922","identifiers":["EUVD-2026-90922","CVE-2026-103921","GHSA-6fw5-9hq8-w87g"]},"retained":false,"historicalAffected":[]},{"revision":"ee3b171647d64e978319f39448f2c599","observedAt":"2026-10-25T04:17:29.458+00:00","statement":{"source":"nvd","id":"CVE-2026-103921","aliases":[],"title":"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:// endpoi…","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.","state":0,"publishedAt":"2026-10-01T17:17:19.39+00:00","modifiedAt":"2026-10-02T18:44:45.66+00:00","affected":[],"metrics":[{"system":"CVSS 3.1 · security-advisories@github.com · Secondary","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":7.4,"severity":"HIGH"}],"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"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-103921","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-295"],"productCriteria":[],"sourceDates":{"published":"2026-10-01T17:17:19.390","lastModified":"2026-10-02T18:44:45.660"},"relatedAdvisories":[],"note":"NVD analysis and CPE criteria are source context, not proof that a package or your environment is affected. Complete affected data, logical configurations and SSVC are retained in the original JSON."},"key":"nvd:CVE-2026-103921","identifiers":["CVE-2026-103921"]},"retained":false,"historicalAffected":[]},{"revision":"a60e707f883c4359b139e4f9d9e3d175","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-6fw5-9hq8-w87g","aliases":["CVE-2026-103921"],"title":"GraphQL Tools: TLS Certificate Validation Disabled in Legacy GraphQL WebSocket Executor","description":"## Impact\n\n`buildWSLegacyExecutor()` in `@graphql-tools/executor-legacy-ws` previously hardcoded `rejectUnauthorized: false` when creating WebSocket connections over WSS. This disabled TLS certificate validation, allowing a network-positioned attacker to perform a Man-in-the-Middle (MITM) attack against applications that use this executor with a `wss://` endpoint. Credentials passed via `connectionParams` or `headers` could be intercepted, and subscription data could be tampered with.\n\n**Who is impacted:** Applications using `@graphql-tools/executor-legacy-ws` (directly or via `@graphql-tools/url-loader` with `SubscriptionProtocol.LEGACY_WS`) to connect to a `wss://` endpoint from Node.js while sending authentication material over the connection.\n\nBrowser WebSocket clients are unaffected by this option (browsers always validate certificates).\n\n## Patches\n\nUpgrade to `@graphql-tools/executor-legacy-ws@1.1.35` or later (and `@graphql-tools/url-loader@9.1.9` or later if you use the loader). TLS certificate validation is enabled by default. Callers that intentionally use self-signed certificates in trusted environments can opt out with `rejectUnauthorized: false`.\n\n## Workarounds\n\n- Prefer the modern `graphql-ws` / `SubscriptionProtocol.WS` path where possible.\n- Until upgraded, avoid sending secrets over legacy WSS connections, or terminate TLS at a trusted proxy and use `ws://` only on trusted networks.\n- Supply a custom `webSocketImpl` that enforces certificate validation.","state":0,"publishedAt":"2026-10-05T22:56:56+00:00","modifiedAt":"2026-10-05T23:15:03.9963052+00:00","affected":[{"ecosystem":"npm","name":"@graphql-tools/executor-legacy-ws","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"1.1.35"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V3","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/ardatan/graphql-tools/security/advisories/GHSA-6fw5-9hq8-w87g","https://nvd.nist.gov/vuln/detail/CVE-2026-103921","https://github.com/ardatan/graphql-tools/pull/8426","https://github.com/ardatan/graphql-tools/commit/3831a0661514c91d99971052f983552556880402","https://github.com/ardatan/graphql-tools","https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-legacy-ws@1.1.35"],"sourceUrl":"https://github.com/advisories/GHSA-6fw5-9hq8-w87g","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-6fw5-9hq8-w87g","identifiers":["GHSA-6fw5-9hq8-w87g","CVE-2026-103921"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. Missing entries do not establish absence of exploitation.","generation":"2026-11-11T19:58:45.4661486+00:00","complete":true,"records":1779,"lastAttemptAt":"2026-11-11T19:58:45.4661486+00:00","lastSuccessAt":"2026-11-11T19:58:45.6262555+00:00","error":null,"lastVerifiedAt":"2026-11-11T19:58:45.6262565+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"cve-program","scope":"Official CVE Program baseline and cumulative hourly delta; all vendors, published and rejected records","generation":"cve-de3b77103708811b6494d2ff7c979037d73ae579742cd1649a5c765137ae5083-bc2564cf749a574ebe6216cd53b2772c98ccf01e107d9e465c7cb9637c59db40","complete":true,"records":424281,"lastAttemptAt":"2026-11-11T19:56:48.005675+00:00","lastSuccessAt":"2026-11-11T19:56:47.8167322+00:00","error":null,"lastVerifiedAt":"2026-11-11T19:56:48.005675+00:00","snapshotPublishedAt":"2026-11-11T19:18:45+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"euvd","scope":"Rolling EUVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global EUVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-dc462e64383b443bb509cbf61bca2cb8","complete":false,"records":13759,"lastAttemptAt":"2026-11-11T20:09:03.8159657+00:00","lastSuccessAt":"2026-11-11T20:09:03.811+00:00","error":"167 identifier lookups failed; latest failures include AccessDenied (HTTP 403). Other identifiers were checked independently.","lastVerifiedAt":"2026-11-11T20:09:03.811+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13431,"expectedIdentifiers":13813,"failedIdentifiers":167},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. 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