CVE-2026-54150: next-video Unauthenticated Arbitrary File Read Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-2p39-2jf3-fv2q",
  "modified" : "2026-08-20T18:35:11Z",
  "published" : "2026-08-20T18:35:11Z",
  "aliases" : [ "CVE-2026-54150" ],
  "summary" : "next-video: Unauthenticated arbitrary file read via /api/video request handler",
  "details" : "### Impact\n\nThe HTTP route handler exported by `next-video/request-handler` — which the README instructs consumers to mount at `/api/video` — allows an unauthenticated remote attacker to read arbitrary `.json` files from the production filesystem of any application following the documented setup.\n\nThe handler's `GET` endpoint accepts a `url` query parameter and uses it to locate and serve a JSON asset descriptor from disk. The only guard between \"remote URL\" and \"local file path\" is a regex check for `^https?://`. Any value that does not match that prefix is treated as a local path, `.json` is appended, and the file is read with `fs.readFile` and returned in the HTTP response — with no authentication, no path canonicalization, and no traversal guard.\n\nOn a typical Next.js deployment this exposes, at minimum:\n- The **Next.js Server Actions AES encryption key** (`.next/server/server-reference-manifest.json`)\n- The **Next.js Preview/Draft Mode keys** (`previewModeId`, `previewModeSigningKey`, `previewModeEncryptionKey`)\n- Internal build manifests, route registries, and absolute runtime paths\n- Application-specific asset metadata (e.g. Mux `uploadId`, `assetId`, `playbackId` values stored in `videos/*.json`)\n\nAny application that mounted `/api/video` following the documented one-liner is affected.\n\n### Patches\n\n2.8.1\n\n### Workarounds\n\nUntil a patched version is available, wrap the exported handler in your own route file and validate the `url` parameter before passing it through:\n\n- Reject any `url` value that does not begin with `https://`, or that does not match a known allowlist of trusted remote hosts.\n- Alternatively, remove the `/api/video` route entirely if your application only uses build-time `import` of local video files and does not use `<Video src=\"https://...\">` with string URLs at runtime.\n\n### References\n\n- `src/request-handler.ts` — the vulnerable GET handler\n- `src/assets.ts` — `getAssetPath()`, where the local-vs-remote branching occurs\n- `src/utils/utils.ts` — `isRemote()`, the sole guard between the two branches\n- `src/config.ts` — `loadAsset()`, which performs the unconstrained `fs.readFile`",
  "severity" : [ {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "next-video"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2.8.1"
      } ]
    } ],
    "database_specific" : {
      "last_known_affected_version_range" : "<= 2.8.0"
    }
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/muxinc/next-video/security/advisories/GHSA-2p39-2jf3-fv2q"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/muxinc/next-video/commit/73abf1d534c2ac48db546ecfed0e89cbaf124f6f"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/muxinc/next-video"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/muxinc/next-video/releases/tag/v2.8.1"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-200" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-08-20T18:35:11Z",
    "nvd_published_at" : null
  }
}