{"id":"GHSA-2p39-2jf3-fv2q","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 `\u003cVideo src=\"https://...\"\u003e` 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`","aliases":["CVE-2026-54150"],"modified":"2026-08-20T18:56:15.575484Z","published":"2026-08-20T18:35:11Z","database_specific":{"cwe_ids":["CWE-200"],"severity":"MODERATE","github_reviewed":true,"github_reviewed_at":"2026-08-20T18:35:11Z","nvd_published_at":null},"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"}],"affected":[{"package":{"name":"next-video","ecosystem":"npm","purl":"pkg:npm/next-video"},"ranges":[{"type":"SEMVER","events":[{"introduced":"0"},{"fixed":"2.8.1"}]}],"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-2p39-2jf3-fv2q/GHSA-2p39-2jf3-fv2q.json","last_known_affected_version_range":"\u003c= 2.8.0"}}],"schema_version":"1.9.0","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"}]}