OSV Malicious Advisory
scanned 2h ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-10115 confirms this npm version as malicious. On `npm install`, the package's postinstall lifecycle script runs the `id` command and transmits the resulting user/group identity to a hardcoded bare-IP endpoint at http://155.190.124.243:6788/ over plain HTTP. Three fallback delivery mechanisms are used (node http.get, curl, wget) to maximize the chance of successful exfiltration across environments...
Advisory
MAL-2026-10115
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in fmt-date-lite (npm)
Details
On `npm install`, the package's postinstall lifecycle script runs the `id` command and transmits the resulting user/group identity to a hardcoded bare-IP endpoint at http://155.190.124.243:6788/ over plain HTTP. Three fallback delivery mechanisms are used (node http.get, curl, wget) to maximize the chance of successful exfiltration across environments. This behavior has no legitimate connection to the package's advertised purpose (a date-formatting utility), and the benign-sounding name and `date-fns-lite` authorship function as cover for the install-time beacon — consistent with a lure/typosquat targeting the date-fns ecosystem. The `id` output reveals the installer's username, UID, GID, and group memberships, providing reconnaissance for follow-on attacks and confirming the callback for the operator.
Decision reason
One or more suspicious static signals were detected.
References
Decision evidence
public snapshotBehavioral surface
ChildProcessNetworkShell
Source & flagged code
2 flagged · loading sourcepackage.jsonView file
•scripts.postinstall = node postinstall.js
High
Install Time Lifecycle Scripts
Package defines install-time lifecycle scripts.
package.jsonView on unpkg•scripts.postinstall = node postinstall.js
Medium
Ambiguous Install Lifecycle Script
Install-time lifecycle script is not statically allowlisted and needs review.
package.jsonView on unpkgFindings
1 High2 Medium1 Low
HighInstall Time Lifecycle Scriptspackage.json
MediumAmbiguous Install Lifecycle Scriptpackage.json
MediumNetwork
LowScripts Present