csa-mfanpm
Advisory published Updated
csa-mfa is a confirmed malicious npm package (MAL-2026-16175) that executes malicious code on install (malicious versions 1.1.15, 1.1.16). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in csa-mfa (npm)
What this malware does
package.json declares a preinstall script that runs wget against http://169.58.142.14:8080/ with query parameters populated by shell command substitution of whoami, ls, and hostname. On npm install this automatically transmits the installer's username, current-directory listing, and hostname to a hardcoded bare-IP HTTP endpoint unrelated to any legitimate publisher infrastructure. There is no functional package purpose served by this behavior.
The OpenSSF Package Analysis project identified 'csa-mfa' @ 1.1.16 (npm) as malicious.
It is considered malicious because:
- 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 csa-mfa (2 malicious versions).
If you installed it — respond
Remove csa-mfa 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 csa-mfa 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
Campaign
References
Credits
- Amazon Inspector · finder
- OpenSSF: Package Analysis · finder
Detect & block this
O3 blocks csa-mfa-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.