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trekhleb/javascript-algorithms

https://github.com/trekhleb/javascript-algorithms · scanned 2026-06-05 04:30 UTC (4 hours, 20 minutes ago) · 10 languages

150 findings (26 legacy + 124 scanner) 78th percentile · Javascript · medium (20-100K LoC) Scanner says 89 (lower by 12)

File as issue Image v2 schema
UNIFIED Repobility · multi-layer engine · AI coders

Complete repo analysis

Last scanned 4 hours, 20 minutes ago · v2 · 88 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
81.0
/100
Repobility
73
26 legacy
9-layer
89
66.7% cov · 62 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 85.0 0.15 12.75
security_score 55.0 0.25 13.75
testing_score 95.0 0.20 19.00
documentation_score 82.0 0.15 12.30
practices_score 82.0 0.15 12.30
code_quality 76.8 0.10 7.68
Overall 1.00 77.8
Severity distribution — click a segment to filter
Active filters: excluding tests × Reset all
Severity: Critical 0 High 15 Medium 7 Low 55 9-Layer: Software Security Quality Integrity Frontend Hardware Data Network Cicd Source: Legacy 26 9-layer 62 Crowd 0 Layer: Software 67 Quality 14 Api 1 Frontend 1 Security 1 Cicd 4
Scan summary Repository scanned at 89.4/100 with 66.7% coverage. It contains 1231 nodes across 0 cross-layer flows, written primarily in mixed languages. Engine surfaced 62 findings — concentrated in software (50), quality (5), cicd (4). Risk profile is low: 0 critical, 0 high, 2 medium. Recommended next step: open the software layer findings first — that's where the highest-impact wins live.

Showing 77 of 88 findings. Click TP / FP to vote on a finding's accuracy — votes adjust the confidence weighting and improve detection across the platform.

high Legacy software dependency conf 0.88 @babel/plugin-transform-modules-systemjs: GHSA-fv7c-fp4j-7gwp
@babel/plugin-transform-modules-systemjs generates arbitrary code when compiling malicious input
package-lock.json dependencylegacy
high Legacy software dependency conf 0.90 ✓ Repobility Action `actions/checkout` pinned to mutable ref `@v4`
`uses: actions/checkout@v4` resolves at workflow-run time. Tags and branches can be re-pushed by the action owner; that made the tj-actions/changed-files compromise (2025) instantly affect ~23K repos. Pin to a 40-char commit SHA + lock with Dependabot or renovate.
.github/workflows/CI.yml:18 dependencylegacy
high Legacy software dependency conf 0.90 ✓ Repobility Action `actions/setup-node` pinned to mutable ref `@v4`
`uses: actions/setup-node@v4` resolves at workflow-run time. Tags and branches can be re-pushed by the action owner; that made the tj-actions/changed-files compromise (2025) instantly affect ~23K repos. Pin to a 40-char commit SHA + lock with Dependabot or renovate.
.github/workflows/CI.yml:21 dependencylegacy
high Legacy software dependency conf 0.90 ✓ Repobility Action `codecov/codecov-action` pinned to mutable ref `@v4`
`uses: codecov/codecov-action@v4` resolves at workflow-run time. Tags and branches can be re-pushed by the action owner; that made the tj-actions/changed-files compromise (2025) instantly affect ~23K repos. Pin to a 40-char commit SHA + lock with Dependabot or renovate.
.github/workflows/CI.yml:35 dependencylegacy
high Legacy software dependency conf 0.88 flatted: GHSA-25h7-pfq9-p65f
flatted vulnerable to unbounded recursion DoS in parse() revive phase
package-lock.json dependencylegacy
high Legacy software dependency conf 0.88 flatted: GHSA-rf6f-7fwh-wjgh
Prototype Pollution via parse() in NodeJS flatted
package-lock.json dependencylegacy
high Legacy software dependency conf 0.88 minimatch: GHSA-23c5-xmqv-rm74
minimatch ReDoS: nested *() extglobs generate catastrophically backtracking regular expressions
package-lock.json dependencylegacy
high Legacy software dependency conf 0.88 minimatch: GHSA-3ppc-4f35-3m26
minimatch has a ReDoS via repeated wildcards with non-matching literal in pattern
package-lock.json dependencylegacy
high Legacy software dependency conf 0.88 minimatch: GHSA-7r86-cg39-jmmj
minimatch has ReDoS: matchOne() combinatorial backtracking via multiple non-adjacent GLOBSTAR segments
package-lock.json dependencylegacy
high Legacy software dependency conf 0.88 picomatch: GHSA-c2c7-rcm5-vvqj
Picomatch has a ReDoS vulnerability via extglob quantifiers
package-lock.json dependencylegacy
medium Legacy quality quality conf 1.00 [SEC087] JS: weak Math.random for crypto: Math.random() is not cryptographically secure; using it for tokens/keys/nonces is predictable. Ported from gosec G404 / eslint detect-pseudoRandomBytes concept (Apache-2.0).
Use `crypto.randomBytes(32).toString('hex')` (Node) or `crypto.getRandomValues()` (browser).
src/algorithms/statistics/weighted-random/weightedRandom.js:39 qualitylegacy
medium Legacy software dependency conf 0.88 ajv: GHSA-2g4f-4pwh-qvx6
ajv has ReDoS when using `$data` option
package-lock.json dependencylegacy
medium Legacy software dependency conf 0.88 brace-expansion: GHSA-f886-m6hf-6m8v
brace-expansion: Zero-step sequence causes process hang and memory exhaustion
package-lock.json dependencylegacy
medium Legacy software dependency conf 0.90 npm package `eslint-plugin-jest` is 2 major version(s) behind (27.9.0 -> 29.15.2)
`eslint-plugin-jest` is pinned/resolved at 27.9.0 but the latest stable release on the npm registry is 29.15.2 (2 major version(s) behind). Outdated dependencies accumulate unpatched bugs and make future security upgrades harder. This is the version-currency signal Dependabot version-update PRs rai…
package.json dependencylegacy
medium Legacy software dependency conf 0.88 picomatch: GHSA-3v7f-55p6-f55p
Picomatch: Method Injection in POSIX Character Classes causes incorrect Glob Matching
package-lock.json dependencylegacy
medium 9-layer cicd supply-chain conf 1.00 GitHub Action is tag-pinned rather than SHA-pinned
codecov/codecov-action@v4 can move without a code change in this repo. Pin third-party actions to a reviewed 40-character commit SHA.
.github/workflows/CI.yml:35 supply-chaingithub-actionspinned-dependencies
medium 9-layer security coverage conf 1.00 No auth library detected
The scanner did not find any standard auth library (JWT, OAuth, NextAuth, Auth0, etc.). Either auth lives in custom code, in a separate service, or is missing.
coverageauth
high Legacy quality quality conf 0.86 Duplicated implementation block across source files
Duplicated blocks are a common artifact when generated code is pasted or recreated instead of reused. They increase maintenance cost because every future bug fix must be found in multiple locations.
src/data-structures/stack/Stack.js:3 qualitylegacy
high Legacy quality quality conf 0.86 Duplicated implementation block across source files
Duplicated blocks are a common artifact when generated code is pasted or recreated instead of reused. They increase maintenance cost because every future bug fix must be found in multiple locations.
src/data-structures/linked-list/LinkedList.js:78 qualitylegacy
high Legacy quality quality conf 0.86 Duplicated implementation block across source files
Duplicated blocks are a common artifact when generated code is pasted or recreated instead of reused. They increase maintenance cost because every future bug fix must be found in multiple locations.
src/data-structures/heap/MinHeapAdhoc.js:2 qualitylegacy
high Legacy quality quality conf 0.86 Duplicated implementation block across source files
Duplicated blocks are a common artifact when generated code is pasted or recreated instead of reused. They increase maintenance cost because every future bug fix must be found in multiple locations.
src/algorithms/graph/depth-first-search/depthFirstSearch.js:1 qualitylegacy
high Legacy quality quality conf 0.86 Duplicated implementation block across source files
Duplicated blocks are a common artifact when generated code is pasted or recreated instead of reused. They increase maintenance cost because every future bug fix must be found in multiple locations.
src/algorithms/graph/bridges/graphBridges.js:20 qualitylegacy
low Legacy software dependency conf 0.90 npm package `@babel/cli` is minor version(s) behind (7.28.6 -> 7.29.7)
`@babel/cli` is pinned/resolved at 7.28.6 but the latest stable release on the npm registry is 7.29.7 (minor version(s) behind). Outdated dependencies accumulate unpatched bugs and make future security upgrades harder. This is the version-currency signal Dependabot version-update PRs raise.
package.json dependencylegacy
low Legacy software dependency conf 0.90 npm package `jest` is minor version(s) behind (30.2.0 -> 30.4.2)
`jest` is pinned/resolved at 30.2.0 but the latest stable release on the npm registry is 30.4.2 (minor version(s) behind). Outdated dependencies accumulate unpatched bugs and make future security upgrades harder. This is the version-currency signal Dependabot version-update PRs raise.
package.json dependencylegacy
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: jest.config.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/cryptography/caesar-cipher/__test__/caesarCipher.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/cryptography/polynomial-hash/__test__/PolynomialHash.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/cryptography/polynomial-hash/__test__/SimplePolynomialHash.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/cryptography/rail-fence-cipher/__test__/railFenceCipher.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/ml/k-means/__test__/kMeans.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/search/interpolation-search/__test__/interpolationSearch.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/combinations/__test__/combineWithoutRepetitions.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/combinations/__test__/combineWithRepetitions.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/fisher-yates/__test__/fisherYates.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/maximum-subarray/__test__/bfMaximumSubarray.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/maximum-subarray/__test__/dcMaximumSubarraySum.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/maximum-subarray/__test__/dpMaximumSubarray.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/permutations/__test__/permutateWithoutRepetitions.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/permutations/__test__/permutateWithRepetitions.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/power-set/__test__/bwPowerSet.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/power-set/__test__/caPowerSet.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/sets/shortest-common-supersequence/__test__/shortestCommonSupersequence.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/stack/valid-parentheses/__test__/validParentheses.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/string/knuth-morris-pratt/__test__/knuthMorrisPratt.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/string/levenshtein-distance/__test__/levenshteinDistance.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/string/longest-common-substring/__test__/longestCommonSubstring.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/string/palindrome/__test__/isPalindrome.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/string/rabin-karp/__test__/rabinKarp.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/string/regular-expression-matching/__test__/regularExpressionMatching.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/string/z-algorithm/__test__/zAlgorithm.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/best-time-to-buy-sell-stocks/__tests__/accumulatorBestTimeToBuySellStocks.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/best-time-to-buy-sell-stocks/__tests__/dpBestTimeToBuySellStocks.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/best-time-to-buy-sell-stocks/__tests__/dqBestTimeToBuySellStocks.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/best-time-to-buy-sell-stocks/__tests__/peakvalleyBestTimeToBuySellStocks.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/hanoi-tower/__test__/hanoiTower.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/jump-game/__test__/backtrackingJumpGame.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/jump-game/__test__/dpBottomUpJumpGame.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/jump-game/__test__/dpTopDownJumpGame.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/jump-game/__test__/greedyJumpGame.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/knight-tour/__test__/knightTour.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/n-queens/__test__/nQueens.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/n-queens/__test__/nQueensBitwise.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/n-queens/__test__/QueensPosition.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/rain-terraces/__test__/bfRainTerraces.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/rain-terraces/__test__/dpRainTerraces.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/recursive-staircase/__test__/recursiveStaircaseBF.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/recursive-staircase/__test__/recursiveStaircaseDP.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/recursive-staircase/__test__/recursiveStaircaseIT.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/recursive-staircase/__test__/recursiveStaircaseMEM.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/square-matrix-rotation/__test__/squareMatrixRotation.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/unique-paths/__test__/btUniquePaths.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/unique-paths/__test__/dpUniquePaths.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/algorithms/uncategorized/unique-paths/__test__/uniquePaths.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer software dead-code-candidate conf 1.00 File has no detected symbols: src/utils/comparator/__test__/Comparator.test.js
Source file with no class/function declarations — possible config, dead code, or scratch file.
dead-code-candidate
low 9-layer cicd supply-chain conf 1.00 GitHub Action is tag-pinned rather than SHA-pinned
actions/checkout@v4 can move without a code change in this repo. Pin third-party actions to a reviewed 40-character commit SHA.
.github/workflows/CI.yml:18 supply-chaingithub-actionspinned-dependencies
low 9-layer cicd supply-chain conf 1.00 GitHub Action is tag-pinned rather than SHA-pinned
actions/setup-node@v4 can move without a code change in this repo. Pin third-party actions to a reviewed 40-character commit SHA.
.github/workflows/CI.yml:21 supply-chaingithub-actionspinned-dependencies
low 9-layer cicd supply-chain conf 1.00 package.json defines install-time lifecycle scripts
preinstall/install/postinstall/prepare scripts execute during dependency installation. Review them carefully for network calls, obfuscation, shell execution, or credential access.
package.json supply-chainnpminstall-scripts
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