registry / Install hook abuse / @doikayt/typescript-build-config / 0.1.32

@doikayt/typescript-build-config@0.1.32

Shared build configuration for TypeScript projects — ESLint, Prettier, tsconfig, and Playwright presets

AI Security Review

scanned 2mo ago · by lpm-firewall-ai

The lifecycle behavior is real and unprompted, but the inspected source is transparent, package-aligned release tooling without a concrete theft, remote-code, or destructive chain. Warn rather than block.

Static reason

One or more suspicious static signals were detected.; source matched previously finalized malicious package; routed for review

Trigger

npm install of this package

Impact

Unprompted modification of project CI/release control surfaces; no confirmed exfiltration or payload execution.

Mechanism

postinstall copies package-owned configuration and CI workflow files

AI rationale

Evidence

package.jsonsrc/postinstall.jssrc/pipeline/release.ymlsrc/pipeline/verify-npm-token.yml.github/workflows/release.yml.github/workflows/verify-npm-token.yml.changeset/config.jsonscripts/auto-changeset.sh

Network endpoints1

registry.npmjs.org

Decision evidence

public snapshot

AI called this Suspicious at 89.0% confidence as Unknown with medium false-positive risk.

Evidence for warning

Install-time postinstall mutates the consuming project, including GitHub workflow and release-pipeline files.
Seeded release workflow grants contents/id-token write and uses an NPM secret to publish.

Evidence against

No credential harvesting, external exfiltration, remote payload loading, eval, or obfuscated source found.
Playwright browser installation is an explicit executable bin guarded against import-time execution.
Project config files are skipped when already present; pipeline files are not overwritten when different.

Behavioral surface

Source

ChildProcessEnvironmentVarsFilesystemShell

Supply chain

HighEntropyStrings

ManifestNo manifest risk signals triggered.

scanned 22 file(s), 31.9 KB of source

Source & flagged code

7 flagged

package.jsonView file

Lines 6-48json

6 "exports": "This block lists the config files that will be extended by files in in src/toplevel - which are copied to consuming project root folder. An example: eslint.config.js imports from '@doikayt/typescript-build-config/eslint'.",

7 "files": "These are the files included in the package tarball. Dotfiles like .gitignore are excluded by npm by default and must be listed explicitly alongside src/."

8 },

9 "type": "module",

10 "main": "src/eslint.js",

11 "exports": {

12 "./eslint": "./src/eslint.js",

13 "./prettier": "./src/prettier.js",

14 "./tsconfig": "./src/tsconfig.base.json",

15 "./playwright": "./src/playwright.js"

16 },

17 "bin": {

18 "typescript-build-config": "src/cli.js",

19 "doikayt-playwright-install": "src/playwright-install.js"

20 },

21 "files": [

22 "src/",

23 "src/top-level/.gitignore",

24 "assets/image/"

25 ],

26 "scripts": {

27 "prepack": "echo no build step required",

28 "postinstall": "node src/postinstall.js",

Medium

Suspicious Lifecycle Evidence

Install-time postinstall mutates the consuming project, including GitHub workflow and release-pipeline files.

package.jsonView on unpkg · L26

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg · L28

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg · L28

29 "update-all-format": "prettier --write src/ && update-markdown-toc README.md && update-markdown-toc docs/verification-runbook.md",

30 "check-format": "prettier --check src/ && update-markdown-toc --check README.md && update-markdown-toc --check docs/verification-runbook.md",

31 "ci": "npm run check-format && node --test tests/*.test.js",

32 "test": "node --test tests/*.test.js"

33 },

34 "publishConfig": {

35 "access": "public"

36 },

37 "engines": {

38 "node": ">=22"

39 },

40 "devDependencies": {

41 "@changesets/cli": "^2.29.8",

42 "@doikayt/update-markdown-toc": "^1.4.17",

43 "@playwright/test": "^1.40.0"

44 },

45 "dependencies": {

46 "@typescript-eslint/eslint-plugin": "^8.0.0",

47 "@typescript-eslint/parser": "^8.0.0",

48 "eslint": "^9.0.0",

src/pipeline/auto-changeset.shView file

•path = src/pipeline/auto-changeset.sh kind = build_helper sizeBytes = 3136 magicHex = [redacted]

Medium

Ships Build Helper

Package ships non-JavaScript build or shell helper files.

src/pipeline/auto-changeset.shView on unpkg

assets/image/jews-support-a-free-palestine-poster.pdfView file

•path = assets/image/jews-support-a-free-palestine-poster.pdf kind = high_entropy_blob sizeBytes = 1040003 magicHex = [redacted]

High

Ships High Entropy Blob

Package ships high-entropy non-source blobs.

assets/image/jews-support-a-free-palestine-poster.pdfView on unpkg

src/playwright.jsView file

•matchType = normalized_sha256 matchedPackage = @doikayt/typescript-build-config@0.1.14 matchedPath = src/playwright.js matchedIdentity = npm:[redacted]:0.1.14 similarity = 1.000 summary = normalized source hash matched finalized malicious source

High

Known Malware Source Similarity

Source file is highly similar to a previously finalized malicious package; route for source-aware review.

src/playwright.jsView on unpkg

src/postinstall.jsView file

Lines 54-94javascript

55if (alreadyExist.length > 0) {

56 console.log(`${PREFIX} Skipping config files — the following already exist:`);

57 for (const destPath of alreadyExist) console.

Source & flagged code

7 flagged · loading source

package.jsonView file

•scripts.postinstall = node src/postinstall.js

High

Install Time Lifecycle Scripts

Package defines install-time lifecycle scripts.

package.jsonView on unpkg

•scripts.postinstall = node src/postinstall.js

Medium

Ambiguous Install Lifecycle Script

Install-time lifecycle script is not statically allowlisted and needs review.

package.jsonView on unpkg

26"scripts": { "prepack": "echo no build step required", "postinstall": "node src/postinstall.js",

Medium

Suspicious Lifecycle Evidence

Install-time postinstall mutates the consuming project, including GitHub workflow and release-pipeline files.

package.jsonView on unpkg · L26

src/pipeline/auto-changeset.shView file

Findings

3 High6 Medium3 Low

HighInstall Time Lifecycle Scriptspackage.json

HighShips High Entropy Blobassets/image/jews-support-a-free-palestine-poster.pdf

HighKnown Malware Source Similaritysrc/playwright.js

MediumAmbiguous Install Lifecycle Scriptpackage.json

MediumEnvironment Vars

MediumShips Build Helpersrc/pipeline/auto-changeset.sh

MediumStructural Risk Force Deep Review

MediumSuspicious Lifecycle Evidencepackage.json

MediumSuspicious Lifecycle Evidencesrc/postinstall.js

LowScripts Present

LowFilesystem

LowHigh Entropy Strings

Affected versions and remediation

This report applies to @doikayt/typescript-build-config@0.1.32.

See all versions of @doikayt/typescript-build-config for other recorded verdicts.

Review the evidence and your use of @doikayt/typescript-build-config@0.1.32 before allowing it. Restrict the permissions described in this report.
Choose an independently verified alternative or release. This report does not establish that other versions are safe.

Evidence last updated: 2026-08-16 23:44:12.695Z (UTC).

Think this verdict is wrong? Dispute it on GitHub or read how reports are produced.