trekhleb/javascript-algorithms

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3 of your 27 findings came from Repobility's proprietary detections. ✓ Repobility tags below mark them.

Scan timing: clone 5.54s · analysis 10.42s · 10.1 MB · GitHub API rate-limit (preflight)

https://github.com/trekhleb/javascript-algorithms · scanned 2026-06-05 04:30 UTC (1 week, 1 day ago) · 10 languages

150 raw signals (26 security + 124 graph) 74th percentile · Javascript · medium (20-100K LoC) System graph score 89 (lower by 12)

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UNIFIED Repobility · multi-layer engine · AI coders

Complete repo analysis

Last scanned 1 week, 1 day ago · v2 · 78 actionable findings from 2 signal sources. 10 repeated signals grouped for readability. Security checks, system graph analysis, and verified AI-agent feedback are merged into one review queue.

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66.7% cov · 59 findings

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 7 Medium 7 Low 55 9-Layer: Software Security Quality Integrity Frontend Hardware Data Network Cicd Source: Security checks 19 System graph 59 Crowd 0 Layer: Software 64 Quality 8 Cicd 3 Api 1 Frontend 1 Security 1

Exclude dismissed / FP Exclude test files

Scan summary Quality grade B+ (78/100). Dimensions: security 55, maintainability 85. 26 findings (14 security). 23,589 lines analyzed.

Showing 69 of 78 actionable findings. 88 raw detector signals were grouped into reader-sized issues. Click TP / FP to vote on a finding's accuracy — votes adjust the confidence weighting and improve detection across the platform.

high Security checks software dependencies 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

high Security checks software dependencies conf 0.88 flatted: GHSA-25h7-pfq9-p65f

flatted vulnerable to unbounded recursion DoS in parse() revive phase

package-lock.json

high Security checks software dependencies conf 0.88 flatted: GHSA-rf6f-7fwh-wjgh

Prototype Pollution via parse() in NodeJS flatted

package-lock.json

medium Security checks cicd CI/CD security conf 0.90 ✓ Repobility 2 occurrences GitHub Action is tag-pinned rather than SHA-pinned

Action `codecov/codecov-action` pinned to mutable ref `@v4` uses a mutable tag or branch. Pin external actions to a reviewed full commit SHA when the workflow is security-sensitive.

lines 35

.github/workflows/CI.yml:35 (2 hits)

CI/CD securitySupply chainGitHub Actions

low Security checks cicd CI/CD security conf 0.90 ✓ Repobility 4 occurrences GitHub Action is tag-pinned rather than SHA-pinned

Action `actions/checkout` pinned to mutable ref `@v4` uses a mutable tag or branch. Pin external actions to a reviewed full commit SHA when the workflow is security-sensitive.

lines 18, 21

.github/workflows/CI.yml:18, 21 (4 hits)

CI/CD securitySupply chainGitHub Actions

high Security checks software dependencies conf 0.88 minimatch: GHSA-23c5-xmqv-rm74

minimatch ReDoS: nested *() extglobs generate catastrophically backtracking regular expressions

package-lock.json

high Security checks software dependencies conf 0.88 minimatch: GHSA-3ppc-4f35-3m26

minimatch has a ReDoS via repeated wildcards with non-matching literal in pattern

package-lock.json

high Security checks software dependencies conf 0.88 minimatch: GHSA-7r86-cg39-jmmj

minimatch has ReDoS: matchOne() combinatorial backtracking via multiple non-adjacent GLOBSTAR segments

package-lock.json

high Security checks software dependencies conf 0.88 picomatch: GHSA-c2c7-rcm5-vvqj

Picomatch has a ReDoS vulnerability via extglob quantifiers

package-lock.json

medium Security checks 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

medium Security checks software dependencies conf 0.88 ajv: GHSA-2g4f-4pwh-qvx6

ajv has ReDoS when using `$data` option

package-lock.json

medium Security checks software dependencies conf 0.88 brace-expansion: GHSA-f886-m6hf-6m8v

brace-expansion: Zero-step sequence causes process hang and memory exhaustion

package-lock.json

medium Security checks software dependencies 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

medium Security checks software dependencies conf 0.88 picomatch: GHSA-3v7f-55p6-f55p

Picomatch: Method Injection in POSIX Character Classes causes incorrect Glob Matching

package-lock.json

medium System graph 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.

auth

low Security checks quality Quality conf 0.60 5 occurrences Duplicated implementation block across source files

Duplicate implementation blocks are maintenance debt. Keep them visible, but they are not a high-severity defect unless the duplicated logic is security-sensitive or drifting.

5 files, 5 locations

src/algorithms/graph/bridges/graphBridges.js:20

src/algorithms/graph/depth-first-search/depthFirstSearch.js:1

src/data-structures/heap/MinHeapAdhoc.js:2

src/data-structures/linked-list/LinkedList.js:78

src/data-structures/stack/Stack.js:3

duplicationquality

low Security checks software dependencies 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

low Security checks software dependencies 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

low System graph software Dead code candidate conf 1.00 File has no detected symbols: jest.config.js