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Malicious code in crosswalker (npm)

Malware Published Jul 27, 2026 to the GitHub Advisory Database • Updated Sep 4, 2026

Package

npm crosswalker (npm)

Affected versions

= 1.0.1
= 1.0.0
= 18.2.1

Patched versions

None

Description

Source: amazon-inspector (b352c9c53fc71d511dae5d0fd8acc4462286092822d70e37dd413593f12bf0d3)

package.json declares preinstall: node index.js, causing index.js to run automatically on npm install. The script collects hostname, platform, arch, homedir, username, uid/gid, shell, OS info, cwd, and the output of whoami and id, then POSTs the JSON payload to a hardcoded URL at https://kbz9yyzq2mtljdwwf6r0tpzlfcl39txi.oastify.com/detox56. The destination is a Burp Collaborator subdomain — out-of-band infrastructure used to confirm exfiltration / RCE during dependency-confusion reconnaissance. Installer host and user identifiers leave the machine without consent on every install.

Credit: OpenSSF (source)

References

Published to the GitHub Advisory Database Jul 27, 2026
Reviewed Jul 27, 2026
Last updated Sep 4, 2026

EPSS score

Weaknesses

Embedded Malicious Code

The product contains code that appears to be malicious in nature. Learn more on MITRE.

GHSA ID

GHSA-9wxp-r2hc-p64q

Source code

No known source code
Improvements are not currently accepted on this advisory because this package is malware and has no patched versions. If there is something to change, please open an issue at https://github.com/github/advisory-database/issues.