f0-abstraction-resolvernpm
Advisory published Updated
f0-abstraction-resolver is a confirmed malicious npm package (MAL-2026-1347) that executes malicious code on install (malicious versions 5.99.99, 99.99.9). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in f0-abstraction-resolver (npm)
What this malware does
The package f0-abstraction-resolver was found to contain malicious code.
The OpenSSF Package Analysis project identified 'f0-abstraction-resolver' @ 5.99.99 (npm) as malicious.
It is considered malicious because:
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The package communicates with a domain associated with malicious activity.
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The package executes one or more commands associated with malicious behavior.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for f0-abstraction-resolver (2 malicious versions).
If you installed it — respond
Remove f0-abstraction-resolver from your project and lockfile, then assume any secrets accessible to the build or runtime were exposed: rotate API keys, tokens, and credentials, and audit for unexpected outbound activity or persistence.
Did it already run?
If f0-abstraction-resolver was installed, its post-install payload may already have run. Removing the package does not undo that — check outbound connections and credential use from the install window onward.
Frequently asked questions
Credits
- Amazon Inspector · finder
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks f0-abstraction-resolver-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the malicious outbound activity and severs the channel.