MAL-2026-11147 Malicious code in simple-probe-utils (npm)
Malicious package
Published
MAL-2026-11147 is a malicious package: simple-probe-utils (npm). Every version was published to cause harm.
Task:
1. Search this repository's dependency manifests and lockfiles for the package, including transitive dependencies.
2. If it is present, remove it, regenerate the lockfile with the project's package manager, and replace whatever it was used for.
3. List any CI runners, developer machines or containers that installed it, so their secrets can be rotated.
4. If the package is not used anywhere, say so and change nothing.
Reference: https://insights.sbomify.com/MAL-2026-11147/ (Markdown: https://insights.sbomify.com/MAL-2026-11147/index.md)
- Package
- simple-probe-utils
- Registry
- npm
What is MAL-2026-11147?
MAL-2026-11147 is a malicious package in simple-probe-utils, published on 28 Jul 2026.
Official description
On npm install, postinstall.js executes shell commands that query cloud instance metadata services (AWS IMDS at 169.254.169.254, plus Tencent, Aliyun, GCP, and Azure endpoints) and extracts the AWS IAM role's temporary security credentials. The captured IAM credentials, hostname, and username are appended as query parameters to an HTTP request to the hardcoded out-of-band host pzs5w7ntzhsnepwk564lyfdci3oucl0a.oastify.com (a Burp Collaborator-style domain). The package.json describes the module as a lightweight string formatting helper; the shipped code contains only the credential-harvesting postinstall, with no string-utility functionality present.
What should I do about MAL-2026-11147?
Remove the package from your dependencies and lockfiles, then rotate any secrets on machines where it was installed.