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Top 5 patterns to fix first

Sorted by anomaly — patterns where this repo ranks worst against the corpus, weighted by severity. Fixing these brings the biggest improvement to your corpus percentile.

high 90th percentile (worse) self.attribute used but never assigned in __init__
25 instances in this repo · corpus median for python repos: 4 · seen in src/flask/config.py:124, src/flask/wrappers.py:206, src/flask/wrappers.py:205, …
high 75th percentile (worse) Phantom test coverage (assertion-free test)
25 instances in this repo · corpus median for python repos: 8 · seen in tests/test_cli.py:217, tests/test_config.py:132, tests/test_config.py:110, …
medium below median Bare except continues silently
4 instances in this repo · corpus median for python repos: 2 · seen in src/flask/cli.py:650, src/flask/cli.py:956, src/flask/app.py:1598, …
high top 10% FastAPI POST/PUT/DELETE/PATCH endpoint without auth
6 instances in this repo · corpus median for python repos: 63 · seen in examples/celery/src/task_app/views.py:30, examples/celery/src/task_app/views.py:36, examples/celery/src/task_app/views.py:22, …
high top 10% Weak Crypto
1 instance in this repo · corpus median for python repos: 4 · seen in src/flask/sessions.py:277
70 of your 88 findings came from Repobility's proprietary detections. ✓ Repobility tags below mark them.

Scan timing: clone 1.89s · analysis 2.23s · 1.8 MB · GitHub preflight 425ms

pallets/flask

https://github.com/pallets/flask.git · scanned 2026-05-19 19:33 UTC (2 weeks, 2 days ago) · 10 languages

640 findings (88 legacy + 552 scanner) 94th percentile · Python · small (2-20K LoC) Scanner says 68 (higher by 20)

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UNIFIED Repobility · multi-layer engine · AI coders

Complete repo analysis

Last scanned 2 weeks, 2 days ago · v8 · 157 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
Combined
80.1
/100
Repobility
93
88 legacy
9-layer
68
88.9% cov · 69 gaps
Critical
0
click to filter
Agents
6
0 votes
Crowd
0
reported
Score breakdown â 2026-05-18-v5
Component Sub-score Weight Contribution
structure_score 100.0 0.15 15.00
security_score 90.4 0.25 22.60
testing_score 100.0 0.20 20.00
documentation_score 73.0 0.15 10.95
practices_score 82.0 0.15 12.30
code_quality 64.0 0.10 6.40
Overall 1.00 87.2
Severity distribution — click a segment to filter
Active filters: excluding tests × Reset all
Severity: Critical 0 High 64 Medium 9 Low 63 9-Layer: Software Security Quality Integrity Frontend Hardware Data Network Cicd Source: Legacy 88 9-layer 69 Crowd 0 Layer: Quality 108 Security 10 Software 23 Frontend 1 Cicd 1 Api 14

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 83 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 Bare except continues silently src/flask/cli.py:650
  • medium Bare except continues silently src/flask/cli.py:956
  • medium Bare except continues silently src/flask/app.py:1598
  • medium Bare except continues silently src/flask/app.py:1017
  • medium Public web service has no security.txt .well-known/security.txt
  • medium [SEC127] AI agent stub — TODO: implement / pass placeholder body: Function body… src/flask/sansio/scaffold.py:220
  • medium [SEC127] AI agent stub — TODO: implement / pass placeholder body: Function body… src/flask/sansio/app.py:476
  • medium [SEC123] Production stack trace / debug output exposed: Debug mode left on in p… src/flask/config.py:65
  • medium [SEC123] Production stack trace / debug output exposed: Debug mode left on in p… src/flask/app.py:663
  • medium [COMP001] High cognitive complexity: Function `find_app_by_string` has cognitiv… src/flask/cli.py:120
  • medium [COMP001] High cognitive complexity: Function `find_best_app` has cognitive com… src/flask/cli.py:41
  • low [COMP001] High cognitive complexity: Function `register` has cognitive complexi… examples/tutorial/flaskr/auth.py:47
View all fragile runtime findings →
Commented-out code 3 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/`.
3 matching findings on this repo
  • info Commented-code block (5 lines) in src/flask/views.py:124
  • info Commented-code block (5 lines) in src/flask/app.py:346
  • info Commented-code block (6 lines) in src/flask/typing.py:73
View all commented-out code findings →
Config drift 7 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.
7 matching findings on this repo
  • high Phantom test coverage: test_config_from_class tests/test_config.py:132
  • high Phantom test coverage: test_config_from_mapping tests/test_config.py:110
  • high Phantom test coverage: test_config_from_file_toml tests/test_config.py:38
  • high Phantom test coverage: test_config_from_file_json tests/test_config.py:31
  • high Phantom test coverage: test_config_from_object tests/test_config.py:25
  • high Phantom test coverage: test_config_from_pyfile tests/test_config.py:19
  • high Insecure pattern 'exec_used' in src/flask/config.py:209 src/flask/config.py:209
View all config drift findings →
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