amplitude-session-replaynpm
Advisory published Updated
amplitude-session-replay is a confirmed malicious npm package (MAL-2026-15497) that executes malicious code on install (malicious version 45.0.0). Do not install it — remove it immediately and rotate any exposed credentials.
Malicious code in amplitude-session-replay (npm)
What this malware does
package.json declares a dependency whose key is the package's own name (amplitude-session-replay) and whose value is a plain HTTPS URL, https://repo.securityctrl.com/amplitude-session-replay, instead of a registry version range. On npm install, npm fetches the tarball bytes returned by that URL and installs whatever it contains, including running any lifecycle scripts inside — with no version pin, no integrity hash, and no registry vetting. The shipped source in the published tarball is an inert stub, so the manifest itself is the delivery mechanism: whoever controls repo.securityctrl.com controls code executed on the installer's machine at install time. The self-referential dependency name (dependency-confusion shape) also encourages resolvers to prefer this entry over any legitimately-named amplitude-session-replay package. The host is unrelated to Amplitude's own domains.
Any computer that has this package installed or running should be considered fully compromised. All secrets and keys stored on that computer should be rotated immediately from a different computer. The package should be removed, but as full control of the computer may have been given to an outside entity, there is no guarantee that removing the package will remove all malicious software resulting from installing it.
Malicious versions
Indicators of compromise (SHA-256)
Detection & response playbook
Malicious packageFind it
Search your lockfiles and build artifacts for amplitude-session-replay (version 45.0.0).
If you installed it — respond
Remove amplitude-session-replay 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 amplitude-session-replay 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
Detect & block this
O3 blocks amplitude-session-replay-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.