vercel/next.js

Public scan — anyone with this URL can view this analysis. Sign up to track your own repos privately, run scheduled re-scans, and get AI fix prompts via your dashboard.

47 of your 177 findings came from Repobility's proprietary detections. ✓ Repobility tags below mark them.

https://github.com/vercel/next.js.git · scanned 2026-05-18 14:32 UTC (2 weeks, 4 days ago) · 10 languages

19517 findings (177 legacy + 19340 scanner) 8/10 scanners ran 38th percentile · Typescript · huge (>500K LoC) Scanner says 71 (higher by 11)

File as issue Image

UNIFIED Repobility · multi-layer engine · AI coders

Complete repo analysis

Last scanned 2 weeks, 4 days ago · v6 · 3391 findings from 2 sources. Findings combine the legacy security pipeline AND the multi-layer engine (atlas, wiring, flows, ranked) AND verified AI agent contributions.

JSON

100.0% cov · 3214 gaps

Score breakdown â 2026-05-18-v5

Component	Sub-score	Weight	Contribution
`structure_score`	60.0	0.15	9.00
`security_score`	100.0	0.25	25.00
`testing_score`	95.0	0.20	19.00
`documentation_score`	63.0	0.15	9.45
`practices_score`	76.0	0.15	11.40
`code_quality`	80.0	0.10	8.00
Overall		1.00	81.8

security_score may be inflated — optional security scanners were skipped on this fast scan

Severity distribution — click a segment to filter

Active filters: excluding tests × Reset all

Severity: Critical 3 High 127 Medium 884 Low 1413 9-Layer: Software Security Quality Integrity Frontend Hardware Data Network Cicd Source: Legacy 177 9-layer 3214 Crowd 0 Layer: Quality 1307 Security 105 Cicd 47 Software 57 Frontend 1860 Network 2 Hardware 13

Exclude dismissed / FP Exclude test files

Bug-class explainers. Each card groups findings of the same shape — these are the patterns most likely to ship to prod and reappear in future scans unless you systematically fix the cause, not just the instance.

Fragile runtime 801 findings

What it is: Code that runs but breaks under predictable input — division by zero, missing keys, unbounded loops, off-by-one slicing.

Why it matters: Reaches production undetected because happy-path tests pass. First user with a weird input crashes the request.

How AI causes it: AI loves writing the happy path; doesn't probe edge cases unless explicitly asked.

Fix approach: Add property-based tests. Wrap external inputs with explicit validators. Use the framework's typed deserializer (Pydantic, attrs).

12 matching findings on this repo

medium [SEC087] JS: weak Math.random for crypto: Math.random() is not cryptographicall… examples/with-mqtt-js/app/page.tsx:53
medium [SEC134] AI scaffold leftover — Lorem ipsum / example.com / John Doe in code: L… examples/api-routes-apollo-server/pages/api/graph…:19
medium [SEC134] AI scaffold leftover — Lorem ipsum / example.com / John Doe in code: L… bench/basic-app/pages/api/page-api.js:2
medium [SEC134] AI scaffold leftover — Lorem ipsum / example.com / John Doe in code: L… bench/basic-app/app/api/app/route.js:2
medium Frontend API reference is not matched by discovered backend routes packages/next/src/shared/lib/router/utils/sortabl…:156
medium Frontend API reference is not matched by discovered backend routes packages/next/src/shared/lib/router/utils/sortabl…:155
medium Frontend API reference is not matched by discovered backend routes packages/next/src/shared/lib/router/utils/sortabl…:154
medium Frontend API reference is not matched by discovered backend routes packages/next/src/shared/lib/router/utils/sortabl…:88
medium Frontend API reference is not matched by discovered backend routes packages/next/src/shared/lib/router/utils/sortabl…:72
medium Frontend API reference is not matched by discovered backend routes packages/next/src/shared/lib/router/utils/sortabl…:71
medium Frontend API reference is not matched by discovered backend routes packages/next/src/server/lib/router-utils/typegen…:1030
medium Frontend API reference is not matched by discovered backend routes packages/next/src/server/lib/router-utils/typegen…:938

View all fragile runtime findings →

Legacy markers 92 findings

What it is: TODO, FIXME, XXX, HACK comments. Often indicate a known-broken path the author meant to fix.

Why it matters: Each marker is an unfinished thought. Production code shouldn't ship with debt that's documented but not tracked.

How AI causes it: AI mirrors the style of the codebase, so existing TODOs propagate into new code.

Fix approach: Convert each into a ticket. Delete the comment when the ticket lands. Use a pre-commit hook to block new TODOs without an issue link.

12 matching findings on this repo

low Stray `console.log` in TS/JS — turbopack/crates/turbopack-tests/tests/snapshot/…
low Stray `console.log` in TS/JS — turbopack/crates/turbopack-tests/tests/snapshot/…
low Stray `console.log` in TS/JS — test/production/next-link-legacybehavior-ref-mer…
medium `dangerouslySetInnerHTML` used in a React component — test/production/next-imag…
info TODO/FIXME marker in shipping code — test/production/next-image-legacy/basic/ba…
info TODO/FIXME marker in shipping code — test/production/next-image-legacy/react-vi…
low Stray `console.log` in TS/JS — test/e2e/next-image-legacy/default/pages/on-load…
low Stray `console.log` in TS/JS — test/e2e/next-image-legacy/default/pages/on-load…
low Stray `console.log` in TS/JS — test/e2e/legacy-link-behavior-pages/index.test.t…
medium `dangerouslySetInnerHTML` used in a React component — packages/next/src/compile…
medium `dangerouslySetInnerHTML` used in a React component — packages/next/src/compile…
medium `dangerouslySetInnerHTML` used in a React component — packages/next/src/compile…

View all legacy markers findings →

Commented-out code 292 findings

What it is: Lines of source that were intentionally disabled but never deleted.

Why it matters: Git already remembers history — commented code rots, becomes wrong, and adds noise to diffs.

How AI causes it: AI sometimes comments out broken code instead of fixing it. Reviewers approve out of inertia.

Fix approach: Delete. Trust `git log`. If you really need to remember, save it in a notes file under `docs/`.

12 matching findings on this repo

info Commented-code block (8 lines) in run-tests.js:1025
info Commented-code block (11 lines) in turbopack/crates/turbopack-tests/tests/execu…
info Commented-code block (6 lines) in turbopack/crates/turbopack-tests/tests/execut…
info Commented-code block (11 lines) in turbopack/crates/turbopack-tests/tests/snaps…
info Commented-code block (6 lines) in turbopack/crates/turbopack-tests/tests/snapsh…
info Commented-code block (12 lines) in turbopack/crates/turbopack-tests/tests/snaps…
info Commented-code block (6 lines) in turbopack/crates/turbopack-ecmascript-runtime…
info Commented-code block (5 lines) in test/jest-setup-after-env.ts:13
info Commented-code block (6 lines) in test/unit/next-babel.test.ts:45
info Commented-code block (6 lines) in test/development/app-dir/cache-components-reu…
info Commented-code block (5 lines) in test/development/app-dir/cache-components-dev…
info Commented-code block (5 lines) in test/development/app-dir/server-hmr/server-hm…

View all commented-out code findings →

Config drift 158 findings

What it is: Settings duplicated across env files, Docker compose, K8s, and code defaults, all with slightly different values.

Why it matters: Production behaviour depends on whichever copy your loader reads first. Subtle bugs in staging that don't reproduce in dev.

How AI causes it: AI writes new config from memory rather than reading the existing source.

Fix approach: Pick one source of truth (env vars + a settings module). Have every other place import from there. Lint for duplicates in CI.

12 matching findings on this repo

low File has no detected symbols: jest.config.js
low File has no detected symbols: lint-staged.config.js
low File has no detected symbols: test-config-errors/next.config.js
low File has no detected symbols: turbopack/crates/turbopack-bench/src/bundlers/vit…
low File has no detected symbols: turbopack/crates/turbopack-bench/src/bundlers/vit…
low File has no detected symbols: turbopack/crates/turbopack-bench/src/bundlers/rsp…
low File has no detected symbols: turbopack/crates/turbopack-bench/src/bundlers/web…
low File has no detected symbols: turbopack/crates/turbopack-bench/src/bundlers/nex…
low Stray `console.log` in TS/JS — turbopack/crates/turbopack-ecmascript/tests/tree…
low Stray `console.log` in TS/JS — turbopack/crates/turbopack-tests/tests/snapshot/…
low Stray `console.log` in TS/JS — turbopack/crates/turbopack-tests/tests/snapshot/…
low Stray `console.log` in TS/JS — turbopack/crates/turbopack-tests/tests/snapshot/…

View all config drift findings →

For AI agents: Voting guide (TP/FP) MCP manifest Stdio wrapper SARIF Integrate Findings queue Vote TP/FP on findings to calibrate the engine.

For AI agents + API integrations

Email me when this repo regresses

Free. We re-scan periodically; new criticals → your inbox. No signup required for the scan itself.

API access

This page is publicly accessible at: https://repobility.com/scan/c62673f3-12b0-4330-8614-ead9a08d2948/

To check status programmatically (no auth required):

curl -s https://repobility.com/api/v1/public/scan/c62673f3-12b0-4330-8614-ead9a08d2948/

Important — please don't re-submit the same URL repeatedly. The submission endpoint is idempotent: re-submitting the same git URL returns this same scan_token, not a new one. To re-scan this repo, sign up free and use the dashboard.