chore(examples) : next.js update for CVE-2025-66478 (#10876)

## Background

https://nextjs.org/blog/CVE-2025-66478

Since some of the examples currently fall within the scope of the
critical RCE vulnerability in React Server Components (CVE-2025-66478),
so I’d like to update this template as well to ensure it can be used
safely. I’d appreciate your consideration of this update.


## Summary

There are no functional changes.
In the `examples` folder, the Next.js version is updated from `15.5.4`
to `15.5.7`.
In the root `package.json`, the Next.js version is updated from
`15.0.0-canary.23` to `15.0.5`.


## Manual Verification

I tried several samples in `examples/next-openai` and confirmed that
they work without any issues.

Author: tsuzaki430

examples/next-agent/package.json

@@ -13,7 +13,7 @@
     "@ai-sdk/react": "3.0.0-beta.132",
     "@vercel/blob": "^0.26.0",
     "ai": "6.0.0-beta.131",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18",
     "react-markdown": "9.0.1",

examples/next-fastapi/package.json

@@ -14,7 +14,7 @@
     "@ai-sdk/react": "3.0.0-beta.132",
     "ai": "6.0.0-beta.131",
     "geist": "^1.3.1",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18"
   },

examples/next-google-vertex/package.json

@@ -12,7 +12,7 @@
     "@ai-sdk/google-vertex": "4.0.0-beta.99",
     "ai": "6.0.0-beta.131",
     "geist": "^1.3.1",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18"
   },

examples/next-langchain/package.json

@@ -15,7 +15,7 @@
     "@langchain/core": "0.1.63",
     "ai": "6.0.0-beta.131",
     "langchain": "0.1.36",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18"
   },

examples/next-openai-kasada-bot-protection/package.json

@@ -13,7 +13,7 @@
     "@ai-sdk/react": "3.0.0-beta.132",
     "@vercel/functions": "^3.1.0",
     "ai": "6.0.0-beta.131",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18",
     "sonner": "^1.7.1"

examples/next-openai-pages/package.json

@@ -12,7 +12,7 @@
     "@ai-sdk/openai": "3.0.0-beta.83",
     "@ai-sdk/react": "3.0.0-beta.132",
     "ai": "6.0.0-beta.131",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18",
     "zod": "3.25.76"

examples/next-openai-telemetry-sentry/package.json

@@ -18,7 +18,7 @@
     "@sentry/opentelemetry": "8.22.0",
     "@vercel/otel": "1.10.0",
     "ai": "6.0.0-beta.131",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18",
     "zod": "3.25.76"

examples/next-openai-telemetry/package.json

@@ -16,7 +16,7 @@
     "@opentelemetry/instrumentation": "0.52.1",
     "@vercel/otel": "1.10.0",
     "ai": "6.0.0-beta.131",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18",
     "zod": "3.25.76"

examples/next-openai-upstash-rate-limits/package.json

@@ -14,7 +14,7 @@
     "@upstash/ratelimit": "^0.4.3",
     "@vercel/kv": "^0.2.2",
     "ai": "6.0.0-beta.131",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18",
     "sonner": "^1.7.1"

examples/next-openai/package.json

@@ -36,7 +36,7 @@
     "class-variance-authority": "^0.7.1",
     "clsx": "^2.1.1",
     "lucide-react": "^0.545.0",
-    "next": "^15.5.4",
+    "next": "^15.5.7",
     "react": "^18",
     "react-dom": "^18",
     "react-markdown": "9.0.1",