diff --git a/.claude/hooks/package.json b/.claude/hooks/package.json
index d1e199d89f8..aaee19cbd08 100644
--- a/.claude/hooks/package.json
+++ b/.claude/hooks/package.json
@@ -21,7 +21,7 @@
     "@local/tsconfig": "workspace:*",
     "@types/node": "22.18.13",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "tsx": "4.20.6",
     "typescript": "5.9.3",
     "vitest": "4.1.8"
diff --git a/apps/hash-ai-worker-ts/package.json b/apps/hash-ai-worker-ts/package.json
index 8468b225cc2..237151af812 100644
--- a/apps/hash-ai-worker-ts/package.json
+++ b/apps/hash-ai-worker-ts/package.json
@@ -110,7 +110,7 @@
     "@types/papaparse": "5.3.16",
     "@types/sanitize-html": "2.16.0",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3",
     "vitest": "4.1.8",
diff --git a/apps/hash-api/package.json b/apps/hash-api/package.json
index 3714ebdb62b..e7eca523426 100644
--- a/apps/hash-api/package.json
+++ b/apps/hash-api/package.json
@@ -131,7 +131,7 @@
     "@types/nodemailer": "6.4.17",
     "@types/sanitize-html": "2.16.0",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3",
     "vitest": "4.1.8",
diff --git a/apps/hash-frontend/package.json b/apps/hash-frontend/package.json
index 77a4485ff4b..1287cdf5083 100644
--- a/apps/hash-frontend/package.json
+++ b/apps/hash-frontend/package.json
@@ -158,8 +158,8 @@
     "@types/react-window": "1.8.8",
     "@types/url-regex-safe": "1.0.2",
     "@welldone-software/why-did-you-render": "10.0.1",
-    "eslint": "9.39.4",
-    "eslint-plugin-react-x": "1.17.2",
+    "eslint": "10.4.1",
+    "eslint-plugin-react-x": "5.8.18",
     "graphology-types": "0.24.8",
     "rimraf": "6.1.3",
     "sass": "1.93.2",
diff --git a/apps/hash-integration-worker/package.json b/apps/hash-integration-worker/package.json
index 49f6ce2667c..1ad8ba5ad01 100644
--- a/apps/hash-integration-worker/package.json
+++ b/apps/hash-integration-worker/package.json
@@ -49,7 +49,7 @@
     "@local/eslint": "workspace:*",
     "@local/tsconfig": "workspace:*",
     "@types/dotenv-flow": "3.3.3",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3",
     "wait-on": "9.0.1"
diff --git a/apps/mcp/linear/package.json b/apps/mcp/linear/package.json
index 1f4dc74a2e3..1979c5dd2be 100644
--- a/apps/mcp/linear/package.json
+++ b/apps/mcp/linear/package.json
@@ -30,7 +30,7 @@
     "@types/dotenv-flow": "3.3.3",
     "@types/node": "22.18.13",
     "chokidar-cli": "3.0.0",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "shx": "0.4.0",
     "tsx": "4.20.6",
diff --git a/apps/mcp/notion/package.json b/apps/mcp/notion/package.json
index 20c2aa01313..6c9e45d33a1 100644
--- a/apps/mcp/notion/package.json
+++ b/apps/mcp/notion/package.json
@@ -30,7 +30,7 @@
     "@types/dotenv-flow": "3.3.3",
     "@types/node": "22.18.13",
     "chokidar-cli": "3.0.0",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "shx": "0.4.0",
     "tsx": "4.20.6",
diff --git a/apps/plugin-browser/package.json b/apps/plugin-browser/package.json
index d69c351a3b2..ed1162ecbc0 100644
--- a/apps/plugin-browser/package.json
+++ b/apps/plugin-browser/package.json
@@ -71,7 +71,7 @@
     "copy-webpack-plugin": "14.0.0",
     "css-loader": "6.11.0",
     "dotenv-flow": "3.3.0",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "file-loader": "6.2.0",
     "fs-extra": "11.3.2",
     "html-loader": "4.2.0",
diff --git a/libs/@blockprotocol/graph/package.json b/libs/@blockprotocol/graph/package.json
index 65a51201512..cf761f8bcd7 100644
--- a/libs/@blockprotocol/graph/package.json
+++ b/libs/@blockprotocol/graph/package.json
@@ -82,7 +82,7 @@
     "@types/lodash.isequal": "4.5.8",
     "@types/node": "22.18.13",
     "@types/react": "19.2.14",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "tsx": "4.20.6",
     "typescript": "5.9.3"
diff --git a/libs/@blockprotocol/type-system/typescript/package.json b/libs/@blockprotocol/type-system/typescript/package.json
index 76aa8be1835..8768349812e 100644
--- a/libs/@blockprotocol/type-system/typescript/package.json
+++ b/libs/@blockprotocol/type-system/typescript/package.json
@@ -65,7 +65,7 @@
     "@types/react": "19.2.14",
     "@types/semver": "7.7.1",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "react": "19.2.6",
     "rimraf": "6.1.3",
     "rollup": "4.59.0",
diff --git a/libs/@hashintel/block-design-system/package.json b/libs/@hashintel/block-design-system/package.json
index 5f1b27452a6..99843f7af2e 100644
--- a/libs/@hashintel/block-design-system/package.json
+++ b/libs/@hashintel/block-design-system/package.json
@@ -44,7 +44,7 @@
     "@types/react": "19.2.14",
     "@types/react-dom": "19.2.3",
     "@types/react-syntax-highlighter": "15.5.13",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "react": "19.2.6",
     "react-dom": "19.2.6",
     "typescript": "5.9.3"
diff --git a/libs/@hashintel/design-system/package.json b/libs/@hashintel/design-system/package.json
index 91265a76c0b..f2f0d52d0b7 100644
--- a/libs/@hashintel/design-system/package.json
+++ b/libs/@hashintel/design-system/package.json
@@ -73,7 +73,7 @@
     "@mui/system": "5.18.0",
     "@types/react": "19.2.14",
     "@types/react-dom": "19.2.3",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "react": "19.2.6",
     "react-dom": "19.2.6",
     "typescript": "5.9.3"
diff --git a/libs/@hashintel/ds-components/package.json b/libs/@hashintel/ds-components/package.json
index ce446402893..918ce2cf40b 100644
--- a/libs/@hashintel/ds-components/package.json
+++ b/libs/@hashintel/ds-components/package.json
@@ -102,7 +102,7 @@
     "case-anything": "3.1.0",
     "colorjs.io": "0.6.1",
     "esbuild-plugin-svgr": "3.1.1",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "lorem-ipsum": "2.0.8",
     "lucide-react": "0.544.0",
     "npm-run-all": "4.1.5",
diff --git a/libs/@hashintel/query-editor/package.json b/libs/@hashintel/query-editor/package.json
index c44f78bbea8..ecc09ea784b 100644
--- a/libs/@hashintel/query-editor/package.json
+++ b/libs/@hashintel/query-editor/package.json
@@ -32,7 +32,7 @@
     "@local/eslint": "workspace:*",
     "@mui/material": "5.18.0",
     "@mui/system": "5.18.0",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "eslint-plugin-storybook": "10.3.1",
     "react": "19.2.6",
     "react-dom": "19.2.6",
diff --git a/libs/@hashintel/type-editor/package.json b/libs/@hashintel/type-editor/package.json
index f6a6614c4cb..e526832da6d 100644
--- a/libs/@hashintel/type-editor/package.json
+++ b/libs/@hashintel/type-editor/package.json
@@ -40,7 +40,7 @@
     "@mui/system": "5.18.0",
     "@types/lodash.memoize": "4.1.9",
     "@types/lodash.uniqueid": "4.0.9",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "eslint-plugin-storybook": "10.3.1",
     "react": "19.2.6",
     "react-dom": "19.2.6",
diff --git a/libs/@local/advanced-types/package.json b/libs/@local/advanced-types/package.json
index 80122b04c5a..41752120125 100644
--- a/libs/@local/advanced-types/package.json
+++ b/libs/@local/advanced-types/package.json
@@ -24,7 +24,7 @@
   "devDependencies": {
     "@local/eslint": "workspace:*",
     "@local/tsconfig": "workspace:*",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "react": "19.2.6",
     "rimraf": "6.1.3",
     "typescript": "5.9.3"
diff --git a/libs/@local/effect-dns/core/package.json b/libs/@local/effect-dns/core/package.json
index 54f51b24c3f..73ab27c8f30 100644
--- a/libs/@local/effect-dns/core/package.json
+++ b/libs/@local/effect-dns/core/package.json
@@ -24,7 +24,7 @@
   "devDependencies": {
     "@local/eslint": "workspace:*",
     "@local/tsconfig": "workspace:*",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3"
   }
diff --git a/libs/@local/effect-dns/hickory/package.json b/libs/@local/effect-dns/hickory/package.json
index 70b2f95e393..9c5ab3a356a 100644
--- a/libs/@local/effect-dns/hickory/package.json
+++ b/libs/@local/effect-dns/hickory/package.json
@@ -22,7 +22,7 @@
     "@local/eslint": "workspace:*",
     "@local/tsconfig": "workspace:*",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3",
     "vitest": "4.1.8"
diff --git a/libs/@local/eslint/package.json b/libs/@local/eslint/package.json
index dd611a99c5d..eefc646a2bd 100644
--- a/libs/@local/eslint/package.json
+++ b/libs/@local/eslint/package.json
@@ -24,7 +24,7 @@
     "@babel/eslint-parser": "7.28.4",
     "@eslint/eslintrc": "3.3.3",
     "effect": "3.21.0",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "eslint-config-airbnb": "19.0.4",
     "eslint-config-flat-gitignore": "2.2.1",
     "eslint-config-prettier": "10.1.8",
diff --git a/libs/@local/graph/sdk/typescript/package.json b/libs/@local/graph/sdk/typescript/package.json
index ba7266407d7..898d65a91a7 100644
--- a/libs/@local/graph/sdk/typescript/package.json
+++ b/libs/@local/graph/sdk/typescript/package.json
@@ -38,7 +38,7 @@
     "@local/eslint": "workspace:*",
     "@local/tsconfig": "workspace:*",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3",
     "vitest": "4.1.8"
diff --git a/libs/@local/graph/type-defs/package.json b/libs/@local/graph/type-defs/package.json
index 6e8b6046a82..6bf36fce7f5 100644
--- a/libs/@local/graph/type-defs/package.json
+++ b/libs/@local/graph/type-defs/package.json
@@ -19,7 +19,7 @@
   },
   "devDependencies": {
     "@local/eslint": "workspace:*",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "quicktype": "16.0.43",
     "tsx": "4.20.6",
     "typescript": "5.9.3"
diff --git a/libs/@local/harpc/client/typescript/package.json b/libs/@local/harpc/client/typescript/package.json
index 00cb321fab5..8857096123d 100644
--- a/libs/@local/harpc/client/typescript/package.json
+++ b/libs/@local/harpc/client/typescript/package.json
@@ -51,7 +51,7 @@
     "@rust/harpc-wire-protocol": "workspace:*",
     "@types/node": "22.18.13",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3",
     "vitest": "4.1.8"
diff --git a/libs/@local/hash-backend-utils/package.json b/libs/@local/hash-backend-utils/package.json
index 4b7caf11292..e2e461cdc6e 100644
--- a/libs/@local/hash-backend-utils/package.json
+++ b/libs/@local/hash-backend-utils/package.json
@@ -83,7 +83,7 @@
     "@types/node": "22.18.13",
     "@types/wait-on": "5.3.4",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3",
     "vitest": "4.1.8"
diff --git a/libs/@local/hash-isomorphic-utils/package.json b/libs/@local/hash-isomorphic-utils/package.json
index 95e250c0fb5..56742a4eba7 100644
--- a/libs/@local/hash-isomorphic-utils/package.json
+++ b/libs/@local/hash-isomorphic-utils/package.json
@@ -68,7 +68,7 @@
     "@types/node": "22.18.13",
     "@types/pluralize": "0.0.33",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "graphql": "16.11.0",
     "next": "15.5.18",
     "react": "19.2.6",
diff --git a/libs/@local/repo-chores/node/package.json b/libs/@local/repo-chores/node/package.json
index 038633b2231..0822b4c5a58 100644
--- a/libs/@local/repo-chores/node/package.json
+++ b/libs/@local/repo-chores/node/package.json
@@ -36,7 +36,7 @@
     "@local/tsconfig": "workspace:*",
     "@types/fs-extra": "11.0.4",
     "@types/js-yaml": "^4",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "typescript": "5.9.3"
   }
 }
diff --git a/libs/@local/status/typescript/package.json b/libs/@local/status/typescript/package.json
index bf3fd22218b..053ec121ec3 100644
--- a/libs/@local/status/typescript/package.json
+++ b/libs/@local/status/typescript/package.json
@@ -27,7 +27,7 @@
     "@types/lodash-es": "4.17.12",
     "@types/node": "22.18.13",
     "@types/yargs": "17.0.34",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "quicktype": "16.0.43",
     "rimraf": "6.1.3",
     "typescript": "5.9.3"
diff --git a/tests/hash-backend-integration/package.json b/tests/hash-backend-integration/package.json
index 8df50911c8a..79b54ecbb38 100644
--- a/tests/hash-backend-integration/package.json
+++ b/tests/hash-backend-integration/package.json
@@ -41,7 +41,7 @@
     "@local/tsconfig": "workspace:*",
     "@types/node-fetch": "2.6.13",
     "@vitest/coverage-istanbul": "4.1.8",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3",
     "vitest": "4.1.8"
diff --git a/tests/hash-playwright/package.json b/tests/hash-playwright/package.json
index a3e41a32e75..3a0f765c007 100644
--- a/tests/hash-playwright/package.json
+++ b/tests/hash-playwright/package.json
@@ -32,7 +32,7 @@
     "@local/eslint": "workspace:*",
     "@types/chrome": "0.1.40",
     "@types/js-yaml": "^4",
-    "eslint": "9.39.4",
+    "eslint": "10.4.1",
     "rimraf": "6.1.3",
     "typescript": "5.9.3"
   }