MalwarePublished 8 Jul 2026

tslint-conf (npm) · Malicious Code

Affects tslint-confSource GCVE Database

Malicious package : remove tslint-conf and rotate any secrets on hosts that installed it.

Data as of 10 Jul 2026, 10:25 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-7022

What to do

Remove tslint-conf from every project, lockfile and image that pulls it in. Treat any host that installed it as compromised: rotate the credentials, tokens and keys it could read, from a clean machine.

Affected software

Product	Affected	Fixed in
npmtslint-conf	Affected =7.2.1	Fixed in–

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Description

The npm package 'tslint-conf' version 7.2.1 is a malicious package masquerading as the legitimate 'pino' logger. It exports middleware that, when invoked, launches a hidden background process which fetches and executes attacker-controlled code with full Node.js privileges. This results in remote code execution on any system using the package. Systems with this package installed should be considered fully compromised, and all secrets on those systems should be rotated from a clean environment.

Impact

Any system with 'tslint-conf' version 7.2.1 installed or running is fully compromised due to remote code execution capabilities granted to attacker-controlled code. This allows an attacker to execute arbitrary code with the privileges of the Node.js process, potentially leading to full system compromise. All secrets and keys stored on the affected system are at risk and should be rotated immediately from a secure environment. Removal of the package alone does not guarantee eradication of the attacker presence.

Defensive guidance

The recommended mitigation is to immediately remove 'tslint-conf' version 7.2.1 from all systems. Treat any affected system as fully compromised: rotate all secrets and credentials from a different, uncompromised device. Conduct a thorough investigation and remediation of the affected environment to ensure no persistent malicious code remains.

Summary

The 'tslint-conf' npm package (version 7.2.1) impersonates the 'pino' logger but contains malicious code. Its default export is an Express-style middleware that synchronously spawns a detached Node.js process running 'lib/caller.js'. This script fetches remote JavaScript code from an attacker-controlled Pinata IPFS URL and executes it using the Function constructor with full access to Node.js 'require'. This unconditional execution of remote code on every middleware use enables remote code execution on the host system. The package is therefore a supply chain malware threat that compromises any system that installs or runs it.

References

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What to do

Affected software

Description

AI analysisMachine-generated, updated 10 Jul 2026, 10:25 UTC

Technical details

References

Community reviews