Which versions of @schedaero/yukon are malicious?

Every published version of @schedaero/yukon on npm is considered malicious. Remove the package entirely.

How do I remediate @schedaero/yukon if I installed it?

@schedaero/yukon is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.

I already installed @schedaero/yukon — how do I know if it already compromised me?

If @schedaero/yukon 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.

How do I find @schedaero/yukon across my projects, lockfiles, and CI pipelines?

Search your lockfiles and build artifacts for @schedaero/yukon (all published versions).

Malicious package

@schedaero/yukonnpm

Advisory published Feb 25, 2026Updated Mar 8, 2026

@schedaero/yukon is a confirmed malicious npm package (MAL-2026-1232) that steals credentials and exfiltrates sensitive data. Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @schedaero/yukon (npm)

MAL-2026-1232

Immediate action

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

npm uninstall @schedaero/yukon

What this malware does

Multiple evidences indicate malicious behavior: suspicious URL, data exfiltration, process exiting, and preinstall script execution.

The package @schedaero/yukon was found to contain malicious code.

Malicious versions

all versions

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

Indicators of compromise (SHA-256)

b02868b7ba4a5e5bf754e692e348191e6974f2f707417f20f97b33f172cda4ca

Detection & response playbook

Credential / info stealer

Find it
Search your lockfiles and build artifacts for @schedaero/yukon (all published versions).
If you installed it — respond
@schedaero/yukon is built to steal secrets, so assume every credential the build or runtime could read is compromised. Remove it from your project and lockfile, then rotate ALL exposed secrets — npm/registry tokens, cloud keys, CI/CD secrets, SSH keys, and any .env values — from a known-clean machine. Audit logs for unauthorized use of those credentials.
Did it already run?
If @schedaero/yukon 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. @schedaero/yukon 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.

References

app.safedep.io

Credits

Amazon Inspector · finder
SafeDep · finder

Detect & block this

O3 blocks @schedaero/yukon-class packages before install and in CI — and if it already ran, its runtime egress monitoring catches the credential exfiltration and severs the channel.

Malware detection Runtime egress monitoring

Explore

All malware advisories How O3 detects malware Vulnerability database