Which versions of wagner-horizon are malicious?

Every published version of wagner-horizon on npm is considered malicious. Remove the package entirely.

How do I remediate wagner-horizon if I installed it?

Remove wagner-horizon 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 wagner-horizon — how do I know if it already compromised me?

If wagner-horizon was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.

Is wagner-horizon part of a known attack campaign?

Yes — wagner-horizon is associated with the GHSA-mpqc-8h6h-24pr 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 wagner-horizon across my projects, lockfiles, and CI pipelines?

Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for wagner-horizon (all published versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging wagner-horizon across your stack and pipelines.

Malicious package

wagner-horizonnpm

Malicious code in wagner-horizon (npm) Remove it immediately and rotate any exposed credentials.

MAL-2026-3286

Immediate action

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

npm uninstall wagner-horizon

What this malware does

The package wagner-horizon was found to contain malicious code.

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

all versions

Every published version of this package is considered malicious — remove it entirely.

Indicators of compromise (SHA-256)

c1c6c42ada769c8af91fc0c7c7212a759d8138cd9f5c4af4d5b736d8f879c154

d97421ed33bbba9349de85dd7f575a7c761e70226645a82545378e6e412d3515

Detection & response playbook

Malicious package

Find it
Scan your lockfiles (package-lock.json, pnpm-lock.yaml, yarn.lock, requirements.txt, poetry.lock, etc.) and build artifacts for wagner-horizon (all published versions). O3 Security's supply-chain scanner checks every dependency against known-malicious package intelligence at install time and in CI, flagging wagner-horizon across your stack and pipelines.
If you installed it — respond
Remove wagner-horizon 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 wagner-horizon was ever installed, its post-install/runtime payload may have already executed. O3's L7 egress monitoring and runtime eBPF sensors detect the credential exfiltration or command-and-control callback after install and block the malicious outbound channel, so you catch and contain the actual compromise — not just the presence of the package.
How O3 protects you
O3 blocks wagner-horizon before install through its supply-chain scanner, and if it has already run, detects and severs the exfiltration or C2 callback at runtime through L7 egress monitoring and eBPF.

Frequently asked questions

No. wagner-horizon on npm has been identified as a malicious package (all published versions flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-mpqc-8h6h-24pr

References

github.com

Credits

Amazon Inspector · finder

Detect & block this

O3 blocks wagner-horizon-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