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Malicious package

@clausehq/flows-step-jsontoxmlnpm

Advisory published Updated

@clausehq/flows-step-jsontoxml is a confirmed malicious npm package (MAL-2025-191202) that steals credentials and exfiltrates sensitive data (malicious version 0.1.14). Do not install it — remove it immediately and rotate any exposed credentials.

Malicious code in @clausehq/flows-step-jsontoxml (npm)

MAL-2025-191202
Immediate action
Remove the package, then rotate any secrets the build/runtime could reach.
npm uninstall @clausehq/flows-step-jsontoxml

What this malware does

The package @clausehq/flows-step-jsontoxml 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.

This package was compromised by the Sha1-Hulud: The Second Coming NPM worm. The malicious payload steals tokens and credentials and publishes them to GitHub. The worm will propogate itself to NPM packages the user owns and establish persistence is a GitHub action. The package may also destroy the user's home directory.

Malicious versions

1 flagged
0.1.14

Indicators of compromise (SHA-256)

6ba2b2b0c0c825b1043f11a2457917fe0d6737999ff4c154569559b7a1c89052
36b86d636a81bfef198ef1c0cae8a1db2ba2f98e79bf90892ffac3697b82fc31
55490991efb020a37958f1460276c1439d022da66dd47d2799e4e676c1d898a2

Detection & response playbook

Credential / info stealer

  1. Find it

    Search your lockfiles and build artifacts for @clausehq/flows-step-jsontoxml (version 0.1.14).

  2. If you installed it — respond

    @clausehq/flows-step-jsontoxml 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.

  3. Did it already run?

    If @clausehq/flows-step-jsontoxml 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. @clausehq/flows-step-jsontoxml on npm has been identified as a malicious package (version 0.1.14 flagged). It should be removed immediately — do not install or keep it in your dependency tree.

Campaign

GHSA-f23q-xj4h-4w4r

References

Credits

  • Amazon Inspector · finder

Detect & block this

O3 blocks @clausehq/flows-step-jsontoxml-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
@clausehq/flows-step-jsontoxml (npm) malicious package — MAL-2025-191202 | O3 Security