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This issue is fixed in version 12.0.1.","state":0,"publishedAt":"2026-10-05T22:56:43.779+00:00","modifiedAt":"2026-10-06T14:48:02.114+00:00","affected":[{"ecosystem":"Vendor product","name":"graphql-tools","ranges":[],"versions":[],"rawVersionEvidence":"{\n                    \"vendor\": \"ardatan\",\n                    \"product\": \"graphql-tools\",\n                    \"versions\": [\n                        {\n                            \"version\": \"< 12.0.1\",\n                            \"status\": \"affected\"\n                        }\n                    ]\n                }"}],"metrics":[{"system":"CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.2,"severity":"HIGH"}],"references":["https://github.com/ardatan/graphql-tools/security/advisories/GHSA-7mx3-vvmw-hjmv","https://github.com/ardatan/graphql-tools/pull/8423","https://github.com/graphql-hive/gateway/pull/2600","https://github.com/ardatan/graphql-tools/commit/0b9529f1988fd36186a7c106a6efe0356f1b7f2e","https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/utils@12.0.1"],"sourceUrl":"https://www.cve.org/CVERecord?id=CVE-2026-104852","license":"CVE Program Terms of Use","key":"cve-program:CVE-2026-104852","identifiers":["CVE-2026-104852"]},"retained":false,"historicalAffected":[]},{"revision":"4ce3ec78ce0b4d2692715c61f38a93ae","observedAt":"2026-11-11T05:30:30.445+00:00","statement":{"source":"euvd","id":"EUVD-2026-92849","aliases":["CVE-2026-104852","GHSA-7mx3-vvmw-hjmv"],"title":"GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to 12.0.1, the GraphQL Tools utils package's mergeDeep function follows inherited properties while recursively merging source objects and does not …","description":"GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to 12.0.1, the GraphQL Tools utils package's mergeDeep function follows inherited properties while recursively merging source objects and does not exclude __proto__, constructor, or prototype keys. An unauthenticated GraphQL client can alias fields to those names so responses from two subgraphs collide during ordinary supergraph result merging, causing mergeDeep to traverse Object and Function prototypes and overwrite Function.prototype.call with a subgraph-supplied value. This breaks subsequent requests in the process until restart. This issue is fixed in version 12.0.1.","state":0,"publishedAt":null,"modifiedAt":null,"affected":[],"metrics":[{"system":"EUVD CVSS 4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":8.2,"severity":null}],"references":["https://github.com/ardatan/graphql-tools/security/advisories/GHSA-7mx3-vvmw-hjmv","https://github.com/ardatan/graphql-tools/pull/8423","https://github.com/graphql-hive/gateway/pull/2600","https://github.com/ardatan/graphql-tools/commit/0b9529f1988fd36186a7c106a6efe0356f1b7f2e","https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/utils@12.0.1"],"sourceUrl":"https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-92849","license":"ENISA EUVD · source terms and attribution apply","enrichment":{"sourceStatus":null,"weaknesses":[],"productCriteria":[],"sourceDates":{"datePublished":"Oct 5, 2026, 10:56:43 PM","dateUpdated":"Oct 6, 2026, 2:48:02 PM"},"relatedAdvisories":[{"id":"RHSA-2026:86891","title":"Red Hat Security Advisory: RHOAI 3.5.2 - Red Hat OpenShift AI","vulnerabilityIds":["CVE-2024-14029","CVE-2026-13697","CVE-2026-15679","CVE-2026-15789","CVE-2026-18427","CVE-2026-19534","CVE-2026-37237","CVE-2026-49825","CVE-2026-49855","CVE-2026-54284","CVE-2026-56859","CVE-2026-59296","CVE-2026-59893","CVE-2026-62243","CVE-2026-62384","CVE-2026-63209","CVE-2026-63374","CVE-2026-66007","CVE-2026-68494","CVE-2026-68497","CVE-2026-69097","CVE-2026-69112","CVE-2026-69152","CVE-2026-69243","CVE-2026-69244","CVE-2026-71281","CVE-2026-71491","CVE-2026-73417","CVE-2026-73502","CVE-2026-73508","CVE-2026-73646","CVE-2026-75838","CVE-2026-75899","CVE-2026-75931","CVE-2026-75975","CVE-2026-76098","CVE-2026-76169","CVE-2026-76172","CVE-2026-76222","CVE-2026-76905","CVE-2026-77354","CVE-2026-77874","CVE-2026-78676","CVE-2026-78677","CVE-2026-78679","CVE-2026-78682","CVE-2026-79674","CVE-2026-79675","CVE-2026-80205","CVE-2026-81722","CVE-2026-81724","CVE-2026-81725","CVE-2026-81726","CVE-2026-81727","CVE-2026-82397","CVE-2026-82417","CVE-2026-84292","CVE-2026-84375","CVE-2026-84381","CVE-2026-84382","CVE-2026-84394","CVE-2026-84428","CVE-2026-84445","CVE-2026-84469","CVE-2026-84504","CVE-2026-84782","CVE-2026-84961","CVE-2026-85124","CVE-2026-85152","CVE-2026-85525","CVE-2026-86332","CVE-2026-87776","CVE-2026-87817","CVE-2026-87819","CVE-2026-88029","CVE-2026-88031","CVE-2026-89425","CVE-2026-91990","CVE-2026-93348","CVE-2026-93599","CVE-2026-93657","CVE-2026-93749","CVE-2026-96749","CVE-2026-96775","CVE-2026-102925","CVE-2026-102930","CVE-2026-102937","CVE-2026-102938","CVE-2026-102990","CVE-2026-104851","CVE-2026-104852","CVE-2026-104861","CVE-2026-104873"]}],"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-2026-92849","identifiers":["EUVD-2026-92849","CVE-2026-104852","GHSA-7mx3-vvmw-hjmv"]},"retained":false,"historicalAffected":[]},{"revision":"0f57653b8ba84eb399e2b07f644fd0ed","observedAt":"2026-10-25T04:17:29.458+00:00","statement":{"source":"nvd","id":"CVE-2026-104852","aliases":[],"title":"GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to 12.0.1, the GraphQL Tools utils package's mergeDeep function follows inherited properties while recursively merging source objects and does not …","description":"GraphQL Tools provides utilities for building, stitching, and mocking GraphQL schemas. Prior to 12.0.1, the GraphQL Tools utils package's mergeDeep function follows inherited properties while recursively merging source objects and does not exclude __proto__, constructor, or prototype keys. An unauthenticated GraphQL client can alias fields to those names so responses from two subgraphs collide during ordinary supergraph result merging, causing mergeDeep to traverse Object and Function prototypes and overwrite Function.prototype.call with a subgraph-supplied value. This breaks subsequent requests in the process until restart. This issue is fixed in version 12.0.1.","state":0,"publishedAt":"2026-10-05T23:17:00.213+00:00","modifiedAt":"2026-10-06T15:17:13.11+00:00","affected":[],"metrics":[{"system":"CVSS 4.0 · security-advisories@github.com · Secondary","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X","score":8.2,"severity":"HIGH"}],"references":["https://github.com/ardatan/graphql-tools/commit/0b9529f1988fd36186a7c106a6efe0356f1b7f2e","https://github.com/ardatan/graphql-tools/pull/8423","https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/utils@12.0.1","https://github.com/ardatan/graphql-tools/security/advisories/GHSA-7mx3-vvmw-hjmv","https://github.com/graphql-hive/gateway/pull/2600"],"sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-104852","license":"NIST NVD usage terms; underlying source attribution retained","enrichment":{"sourceStatus":"Awaiting Analysis","weaknesses":["CWE-1321"],"productCriteria":[],"sourceDates":{"published":"2026-10-05T23:17:00.213","lastModified":"2026-10-06T15:17:13.110"},"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-2026-104852","identifiers":["CVE-2026-104852"]},"retained":false,"historicalAffected":[]},{"revision":"cac9f1bdfd2b4c379750d9fb0df4e8b0","observedAt":"2026-10-24T13:17:17.793+00:00","statement":{"source":"osv","id":"GHSA-7mx3-vvmw-hjmv","aliases":["CVE-2026-104852"],"title":"GraphQL Tools has prototype pollution in well-established utility function `mergeDeep`","description":"Closed by https://github.com/ardatan/graphql-tools/pull/8423\nMitigated in Hive Gateway by https://github.com/graphql-hive/gateway/pull/2600\n\nA client can alias fields to `constructor`, `__proto__` or `prototype` so that the response keys from two subgraphs collide on those names during result merging. Because `mergeDeep` recursed through inherited properties, the merge walked `{}.constructor` to `Object`, then `Object.__proto__` to `Function.prototype`, and wrote a subgraph-supplied value over `Function.prototype.call`, breaking every subsequent request in the process until restart. This is remotely triggerable by an unauthenticated client with a single query against any supergraph that merges an object from two subgraphs, which is the ordinary `@shareable` or entity case, so it is a denial of service rather than a theoretical hardening issue.\n\n\n```graphql\n{\n  shared {\n    fieldA\n    constructor: fieldB {\n      __proto__: child {\n        call: value\n      }\n    }\n  }\n}\n```","state":0,"publishedAt":"2026-10-05T22:56:46+00:00","modifiedAt":"2026-10-05T23:15:03.9906365+00:00","affected":[{"ecosystem":"npm","name":"@graphql-tools/utils","ranges":[{"type":"SEMVER","events":[{"kind":"introduced","version":"0"},{"kind":"fixed","version":"12.0.1"}]}],"versions":[],"rawVersionEvidence":null}],"metrics":[{"system":"CVSS_V4","vector":"CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N","score":null,"severity":null},{"system":"Publisher rating","vector":null,"score":null,"severity":"HIGH"}],"references":["https://github.com/ardatan/graphql-tools/security/advisories/GHSA-7mx3-vvmw-hjmv","https://github.com/ardatan/graphql-tools/pull/8423","https://github.com/graphql-hive/gateway/pull/2600","https://github.com/ardatan/graphql-tools/commit/0b9529f1988fd36186a7c106a6efe0356f1b7f2e","https://github.com/ardatan/graphql-tools","https://github.com/ardatan/graphql-tools/releases/tag/@graphql-tools/utils@12.0.1"],"sourceUrl":"https://github.com/advisories/GHSA-7mx3-vvmw-hjmv","license":"GitHub Advisory Database · CC-BY-4.0","key":"osv:GHSA-7mx3-vvmw-hjmv","identifiers":["GHSA-7mx3-vvmw-hjmv","CVE-2026-104852"]},"retained":false,"historicalAffected":[]}],"coverage":[{"source":"cisa-kev:global","scope":"Complete CISA KEV catalog; all vendors. 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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-daa70f0e05b540b28ec429806bdccfc4","complete":false,"records":13759,"lastAttemptAt":"2026-11-11T15:09:37.2726122+00:00","lastSuccessAt":"2026-11-11T15:09:37.269+00:00","error":null,"lastVerifiedAt":"2026-11-11T15:09:37.269+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13582,"expectedIdentifiers":13813,"failedIdentifiers":0},{"source":"first-epss:nuget","scope":"FIRST EPSS for explicit CVE aliases in the collected public NuGet archive. Not a global EPSS backfill.","generation":"2026-11-11T14:57:42.7555955+00:00","complete":true,"records":1097,"lastAttemptAt":"2026-11-11T14:57:42.7555955+00:00","lastSuccessAt":"2026-11-11T14:57:42.9331503+00:00","error":null,"lastVerifiedAt":"2026-11-11T14:57:42.9331505+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"nvd","scope":"Rolling NVD lookups of CVE aliases in current public OSV archives; 500 identifiers per refresh, rechecked after 48 hours. Not a global NVD catalog. Successful not-found lookups count as checked; they do not imply withdrawal or safety. No reader inventory is sent.","generation":"enrichment-11785b13898646a1917b06b09d2df4a4","complete":true,"records":13753,"lastAttemptAt":"2026-11-11T14:57:44.6046058+00:00","lastSuccessAt":"2026-11-11T13:57:34.909+00:00","error":null,"lastVerifiedAt":"2026-11-11T13:57:34.909+00:00","snapshotPublishedAt":null,"importing":false,"stagedRecords":0,"checkedIdentifiers":13813,"expectedIdentifiers":13813,"failedIdentifiers":0},{"source":"osv:Go","scope":"Complete OSV Go ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"go-3562b6c78fd1bd0f0b55daf66a0926ae24f65e462df7f6d928caad458fc696bf","complete":true,"records":9947,"lastAttemptAt":"2026-11-11T14:57:42.5803744+00:00","lastSuccessAt":"2026-11-11T04:27:43.6877707+00:00","error":null,"lastVerifiedAt":"2026-11-11T14:57:42.5803744+00:00","snapshotPublishedAt":"2026-11-11T03:32:46+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:NuGet","scope":"Complete OSV NuGet ecosystem archive, including GitHub Advisory Database records; NuGet version matching only","generation":"nuget-456002455e0ab94bb92c95476d4e6d175c104cd594749982afd96c893728ecbc","complete":true,"records":2010,"lastAttemptAt":"2026-11-11T14:57:42.3614093+00:00","lastSuccessAt":"2026-11-11T02:36:58.1276999+00:00","error":null,"lastVerifiedAt":"2026-11-11T14:57:42.3614093+00:00","snapshotPublishedAt":"2026-11-11T01:17:51+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:crates.io","scope":"Complete OSV crates.io ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"crates.io-baa8362b4daf9e5f39d5563775a55935e7b442c0735d33274a921579ce4a0d66","complete":true,"records":3093,"lastAttemptAt":"2026-11-11T14:57:42.6953487+00:00","lastSuccessAt":"2026-11-11T13:00:02.5446881+00:00","error":null,"lastVerifiedAt":"2026-11-11T14:57:42.6953487+00:00","snapshotPublishedAt":"2026-11-11T12:47:47+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null},{"source":"osv:npm","scope":"Complete OSV npm ecosystem archive, including withdrawn and malicious-package source records; statement counts are not unique CVE counts","generation":"npm-10cb353ca77c2a8069d6892d1d394d936b12c0add3c8749e2a1a03a1c5d50426","complete":true,"records":231666,"lastAttemptAt":"2026-11-11T14:57:42.4738411+00:00","lastSuccessAt":"2026-11-11T12:59:55.8981437+00:00","error":null,"lastVerifiedAt":"2026-11-11T14:57:42.4738411+00:00","snapshotPublishedAt":"2026-11-11T12:32:53+00:00","importing":false,"stagedRecords":0,"checkedIdentifiers":null,"expectedIdentifiers":null,"failedIdentifiers":null}]}