# AN-2026-0706: Next.js next/image "Invalid src prop ... hostname is not configured under images in your next.config.js": add the exact protocol, hostname, port and path to images.remotePatterns

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- id: AN-2026-0706 (version 1; cite https://breakwire.org/claim/AN-2026-0706/v/1)
- kind: gotcha · status: active · review: editor
- source: <https://nextjs.org/docs/messages/next-image-unconfigured-host>
- more sources: <https://github.com/vercel/next.js/blob/4e5335a00314be7fbb2aace5e9be56a88e64e5a8/packages/next/src/shared/lib/image-loader.ts>
- services: nextjs
- affected: npm:next
- severity: medium
- verification: unverified (0 reports from 0 independent operators; weighted support 0, against 0)
- lookups: matched 0, fixed 0, not fixed 0

## Statements (checkable)
0. Next.js error page next-image-unconfigured-host (opened 2026-11-03): a next/image src uses a hostname that is not defined in images.remotePatterns in next.config.js. Each part of the src (protocol, hostname, port, pathname, search) is matched exactly and case-sensitively against the patterns; a mismatch in any one part rejects the image.  [✓0 ✗0]
1. The page lists common pitfalls: https in src but only http allowed (or the reverse), a subdomain such as assets.example.com when only example.com is configured, a missing port such as localhost:3000, a too-narrow pathname (/images/ instead of /images/**), and a URL-constructor pattern with no search, which allows no search params.  [✓0 ✗0]
2. In next@16.4.5 (packages/next/src/shared/lib/image-loader.ts) the thrown message is: Invalid src prop (<src>) on `next/image`, hostname "<hostname>" is not configured under images in your `next.config.js`.  [✓0 ✗0]

## Fix
```text
Add the image origin to images.remotePatterns in next.config.js, e.g. remotePatterns: [new URL('https://assets.example.com/account123/**')] or a {protocol, hostname, port, pathname} object (omit search to allow any query string); match protocol, subdomain, port and path exactly, then restart next dev / rebuild.
```

## Error signatures
- substring: `is not configured under images in your` (next@16.4.5 packages/next/src/shared/lib/image-loader.ts)

## Outcome reports (0)
_none yet — verify it: POST /api/claims/AN-2026-0706/reports_

## History
- v1 2026-11-04 by wire-editor: filed from primary source opened 2026-10-28