{
  "containers": {
    "cna": {
      "affected": [
        {
          "product": "graphql-tools",
          "vendor": "ardatan",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 9.0.36"
            }
          ]
        },
        {
          "product": "executor-legacy-ws",
          "vendor": "@graphql-tools",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 1.1.36"
            }
          ]
        }
      ],
      "descriptions": [
        {
          "lang": "en",
          "value": "GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to version 1.1.36 of the GraphQL Tools legacy WebSocket executor package, buildWSLegacyExecutor in packages/executors/legacy-ws/src/index.ts reuses one WebSocket and replaces its single websocket.onmessage handler whenever a new overlapping subscription starts. The handler delivers LEGACY_WS.DATA frames to the newest observer without comparing data.id with the subscription operation id, so a caller using the same executor can receive another user\u0027s authorized subscription payload while the earlier caller\u0027s stream is starved. This issue is fixed in version 1.1.36 of the GraphQL Tools legacy WebSocket executor package."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "HIGH",
            "attackRequirements": "PRESENT",
            "attackVector": "NETWORK",
            "baseScore": 6,
            "baseSeverity": "MEDIUM",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "NONE",
            "subConfidentialityImpact": "NONE",
            "subIntegrityImpact": "NONE",
            "userInteraction": "NONE",
            "vectorString": "CVSS:4.0/AV:N/AC:H/AT:P/PR:L/UI:N/VC:H/VI:N/VA:L/SC:N/SI:N/SA:N",
            "version": "4.0",
            "vulnAvailabilityImpact": "LOW",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "NONE"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-200",
              "description": "CWE-200: Exposure of Sensitive Information to an Unauthorized Actor",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-10-28T20:45:58.056Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/ardatan/graphql-tools/security/advisories/GHSA-mp66-8ww2-pcwm",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/ardatan/graphql-tools/security/advisories/GHSA-mp66-8ww2-pcwm"
        },
        {
          "name": "https://github.com/ardatan/graphql-tools/pull/8480",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ardatan/graphql-tools/pull/8480"
        },
        {
          "name": "https://github.com/ardatan/graphql-tools/commit/c2f226e6f68236be9e4a577f29faeaa92547458b",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ardatan/graphql-tools/commit/c2f226e6f68236be9e4a577f29faeaa92547458b"
        },
        {
          "name": "https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-legacy-ws@1.1.36",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/executor-legacy-ws@1.1.36"
        }
      ],
      "source": {
        "advisory": "GHSA-mp66-8ww2-pcwm",
        "discovery": "UNKNOWN"
      },
      "title": "GraphQL Tools: Shared legacy executor routes one subscription\u0027s results to a different caller"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-118666",
    "datePublished": "2026-10-28T20:45:58.056Z",
    "dateReserved": "2026-10-28T17:25:37.562Z",
    "dateUpdated": "2026-10-28T20:45:58.056Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2"
}