⌘ + K

MAL-2026-3684

Dashboard / Malicious Package / MAL-2026-3684

MAL-2026-3684

Published: 12 May 2026Last Modified: 13 May 2026

Summary: Malicious code in @gusmano/reext (npm)

Details: Source: amazon-inspector (498a21b60dcdfe236ea0b1683e1ec64aa091643b6ad562c3845757eed79660d8) The npm preinstall lifecycle script (dist/scripts/preinstall.js, wired via package.json "preinstall": "node./dist/scripts/preinstall.js") reads the installer's ~/.gitconfig via iniparser.parseSync(home_dir+'/.gitconfig') and the OS username via os.userInfo().username, then issues an HTTPS GET to the hardcoded endpoint https://2tak.l.serverhost.name:1962/mobile/reext with osname, gitname, and gitemail supplied as query parameters. The code explicitly branches on `if (osname === 'xmarcgusmano') { server = 'http://localhost:1962' } else { server = 'https://2tak.l.serverhost.name:1962' }`, confirming that the remote-host path fires for every installer that is not the author's own machine — a deliberate exfiltration path gated by the author's own username. The destination is not a documented vendor endpoint; it is an author-controlled third-party host the installer did not opt into. Separately, dist/scripts/postinstall.js resolves `path.resolve(__dirname, '../../package.json')` (the consuming project's own package.json relative to node_modules/@gusmano/reext/dist/scripts/) and rewrites it, deleting scripts.dev/build/test/watch/coverage, the entire `scripts` key, `eslintConfig`, `devDependencies`, and `dependencies`, then rm -rf's several dist subfolders — destructive, unauthorized mutation of the installer's project files. The combination (silent install-time exfiltration of personal identity data to an author-controlled host plus destructive rewrite of the consumer's manifest) is unambiguously harmful to installers.

Affected packages

Package

Name: @gusmano/reext

Purl: pkg:npm/%40gusmano/reext

Affected ranges

Type: N/A

Events:

Introduced- None

Fixed -None

Affected versions

0.0.104

0.0.166

0.0.216

0.0.150

0.0.148

0.0.218

0.0.197

0.0.276

0.0.92

0.0.98

0.0.317

0.0.169

0.0.209

0.0.250

0.0.236

0.0.121

0.0.198

0.0.128

0.0.190

0.0.352

0.0.223

0.0.261

0.0.315

0.0.235

0.0.251

0.0.473

0.0.358

0.0.188

0.0.390

0.0.237

0.0.255

0.0.222

0.0.324

0.0.346