OpenSSF/OSV advisory MAL-2026-14422 confirms this npm version as malicious. package.json declares a postinstall lifecycle script that runs curl against https://webhook.site/<id> with the installer's hostname appended as a query parameter, transmitting the host identifier to a third-party request-inspection collector on every npm install. The package name @medisend/core with version 0.0.1-security-research and a description referencing a dependency-confusion test targets internal builds that...
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in @medisend/core (npm)
Details
package.json declares a postinstall lifecycle script that runs curl against https://webhook.site/<id> with the installer's hostname appended as a query parameter, transmitting the host identifier to a third-party request-inspection collector on every npm install. The package name @medisend/core with version 0.0.1-security-research and a description referencing a dependency-confusion test targets internal builds that expect a private @medisend/core package; when such a build resolves this public package instead, the postinstall runs automatically and leaks the installer's hostname off-host. The self-labelled 'security research' framing does not change the effect: any installer that resolves this package executes an unconsented host-identifier beacon to a destination controlled by whoever provisioned the webhook.site URL.
Decision reason
OpenSSF Malicious Packages via OSV confirms @medisend/core@0.0.1-security-research as malicious (MAL-2026-14422): Malicious code in @medisend/core (npm)