Which versions of ersagent-frontend are malicious?

The following npm versions of ersagent-frontend are flagged malicious: 9.5.5. Treat any of these as compromised.

How do I remediate ersagent-frontend if I installed it?

Remove ersagent-frontend 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.

I already installed ersagent-frontend — how do I know if it already compromised me?

If ersagent-frontend 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.

Is ersagent-frontend part of a known attack campaign?

Yes — ersagent-frontend is associated with the RLMA-2026-01289 campaign. Packages in the same campaign often share infrastructure and payloads, so check whether any related packages are also in your dependency tree.

How do I find ersagent-frontend across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for ersagent-frontend (version 9.5.5).

Malicious package

ersagent-frontendnpm

Advisory published Mar 18, 2026Updated Mar 23, 2026

ersagent-frontend is a confirmed malicious npm package (MAL-2026-1726) that executes malicious code on install (malicious version 9.5.5). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in ersagent-frontend (npm)

MAL-2026-1726

Immediate action

Remove the package, then rotate any secrets the build/runtime could reach.

npm uninstall ersagent-frontend

What this malware does

The package ersagent-frontend was found to contain malicious code.

Malicious versions

1 flagged

9.5.5

Indicators of compromise (SHA-256)

b0f14dfa194ef771159589b781141de3f6f83e12ed62f6b313e22320af7c15ae

0daad6f453576f7151fc8a9260bb07623621adfa308616bbe4f5b88f9eabe0d4

Detection & response playbook

Malicious package

Find it
Search your lockfiles and build artifacts for ersagent-frontend (version 9.5.5).
If you installed it — respond
Remove ersagent-frontend 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 ersagent-frontend 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

No. ersagent-frontend on npm has been identified as a malicious package (version 9.5.5 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

RLMA-2026-01289

Credits

Amazon Inspector · finder
ReversingLabs · finder

Detect & block this

O3 blocks ersagent-frontend-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.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database