MalwarePublished 29 Apr 2026Updated 30 Apr 2026

period-newline (npm) · Malicious Code

Affects period-newlineSource GCVE Database

Malicious package : remove period-newline and rotate any secrets on hosts that installed it.

Data as of 27 Oct 2026, 00:32 UTC

Classification

Malicious package

Published to npm · OSV MAL-2026-3181

What to do

Remove period-newline 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
npmperiod-newline	Affected =0.1.0	Fixed in–

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Description

The npm package 'period-newline' version 0.1.0 was published with malicious code by the threat actor 'ryanmccollum1'. This package impersonates a benign text-formatting utility but is part of a supply chain attack campaign that also includes the 'redeem-onchain-sdk' package. The malicious code collects sensitive data such as SSH keys, AWS credentials, .npmrc tokens, Docker authentication data, Chrome saved logins, .env files, and git history, then exfiltrates this information over a raw TCP socket to a command-and-control server hosted on AWS.

Impact

If installed, the malicious 'period-newline' package can lead to the compromise of sensitive credentials and secrets including SSH keys, AWS credentials, npm tokens, Docker authentication data, Chrome saved logins, environment variables, and git history. This can result in unauthorized access to cloud resources, source code repositories, and other critical infrastructure, potentially leading to further compromise and data breaches.

Defensive guidance

Users should avoid installing or using the 'period-newline' package version 0.1.0. Review and audit dependencies for suspicious or untrusted packages, especially those published by unknown or impersonating authors. Remove the malicious package if already installed and rotate any potentially compromised credentials. Monitor for any signs of exfiltration or unauthorized access related to this threat.

Summary

The 'period-newline' npm package (version 0.1.0) contains malicious code published by the threat actor 'ryanmccollum1'. It is part of a supply chain attack campaign alongside the 'redeem-onchain-sdk' package. The malicious package collects a wide range of sensitive credentials and configuration files from infected systems and exfiltrates them to an AWS-hosted command-and-control server via a raw TCP socket. This represents a targeted effort to compromise developer environments and steal critical secrets.

References

safedep.io/redeem-onchain-sdk-polymarket-npm-malware/ (opens in a new tab)

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What to do

Affected software

Description

AI analysisMachine-generated, updated 27 Oct 2026, 00:32 UTC

Technical details

References

Community reviews