simplewave

GHSA-p2p5-jx9w-mr89

Malicious code in simplewave (npm)

Details

**Severity:** Critical

**Affected versions:** `= 0.0.2`

## Source: amazon-inspector (d984cf27dec602e96199a4361b485f0a7c79e2134977a355d42ddb46edd606d0)
[email protected] declares a postinstall script in package.json that runs an inline Node command performing an HTTP GET to a subdomain of oast.fun with the installer's os.hostname() embedded as the leftmost DNS label. oast.fun is the public Interactsh out-of-band interaction server, used to receive exfiltrated data via DNS/HTTP callbacks. The beacon fires unconditionally on npm install, with no caller consent or configuration. The shipped index.js is a trivial stub providing no advertised functionality, so the manifest-level beacon is the package's entire effect. The host identifier of every machine that installs the package is delivered to a third-party OOB collector controlled by whoever provisioned the oast.fun subdomain token.

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Credit: [OpenSSF](https://github.com/ossf/malicious-packages) ([source](https://github.com/ossf/malicious-packages/blob/f17c406fb7ee5243da902499814340765fd9b86a/osv/malicious/npm/simplewave/MAL-2026-18187.json))

**References:**
- https://github.com/ossf/malicious-packages/blob/f17c406fb7ee5243da902499814340765fd9b86a/osv/malicious/npm/simplewave/MAL-2026-18187.json
- https://www.npmjs.com/package/simplewave/v/0.0.2
- https://github.com/advisories/GHSA-p2p5-jx9w-mr89

Compromised versions (1)

= 0.0.2

Any computer that installed or ran a compromised version should be considered fully compromised. Rotate every secret on that machine from a clean environment.