kmf-bootstrap@100.100.101
This package appears in our research on the dependency confusion probes at version 99 and above, with how it works, the full package list and what to do if you installed it.
OpenSSF/OSV Malicious Advisory
imported 12d ago · by OpenSSF/OSVOpenSSF/OSV advisory MAL-2026-17746 confirms this npm version as malicious.
Advisory
MAL-2026-17746
Source
OpenSSF Malicious Packages via OSV
Summary
Malicious code in kmf-bootstrap (npm)
Details
On npm install, the package's postinstall script performs two exfiltration actions. First, it reads the installer's hostname and npm_package_name and issues DNS resolutions for a label of the form <host>.<pkg>.db4jlbku53082dmp0d7g3mffj7s7aordk.oast.me, leaking those identifiers to an Interactsh (oast.me) collaborator over DNS. Second, postinstall.js require()s a shipped Linux x64 native addon at prebuilds/linux-x64/addon.node that calls gethostname() and getpwuid()->pw_name and reads the npm_package_name and npm_config_registry environment variables, then opens a raw socket and sends an HTTP POST with body h=<host>&u=<user>&p=<pkg>&r=<registry> to the bare IP 64.181.165.115 (Host header 64.181.165.115, path /dc, HTTP/1.0, no TLS). The destination is a bare IP with no relation to the package publisher and the npm_config_registry value can disclose a private/internal registry URL from the installer's.npmrc. The native component is opaque code auto-executed during install with host-level network egress. The package name resembles the common 'bootstrap' naming convention, consistent with a dependency-confusion / typosquat lure whose purpose is to beacon successful installs and private registry metadata.
## Source: ossf-package-analysis (4a4e085f9bdddf6800e613b7cdfeb6b2481b2fe9bf0ccb2a5b1bffad9538194b) The OpenSSF Package Analysis project identified 'kmf-bootstrap' @ 100.100.102 (npm) as malicious.
It is considered malicious because:
- The package communicates with a domain associated with malicious activity.
Source & flagged code
0 flagged · loading sourceNo flagged code excerpts are attached to this scan.
Findings
1 High
HighOsv Malicious Advisory
Affected versions and remediation
This report applies to kmf-bootstrap@100.100.101.
The same advisory and Firewall decision cover 3 recorded versions
100.100.100, 100.100.101, 100.100.106
See all versions of kmf-bootstrap for other recorded verdicts.
- Avoid installing kmf-bootstrap@100.100.101. Remove it from direct dependencies and check your lockfile for transitive copies.
- Choose an independently verified alternative or release. This report does not establish that other versions are safe.
- If this version ran, investigate the affected machine and build environment. Rotate credentials it could access and rebuild from a trusted environment.
Evidence last updated: .
Source advisory published: .
This report uses published external intelligence. The advisory does not provide a separate source-code analysis for each listed version.
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