Checkmarx supply chain attack impacts Bitwarden npm distribution path

Security Affairs

April 24, 2026 at 9:34 AM

Actively Exploited

Overview

The Bitwarden command-line interface (CLI) version 2026.4.0 has been compromised as part of the Checkmarx supply chain attack, which introduced malicious code into the bw1.js file through a compromised GitHub Action. This incident raises concerns for users of Bitwarden, a popular password management tool, as the malicious code could potentially expose sensitive information. Researchers are warning that this breach is part of a larger ongoing campaign, which could impact other software and systems if not addressed. Users of the affected version should take immediate action to secure their systems and check for any unauthorized access. This incident serves as a reminder of the vulnerabilities present in software supply chains and the need for vigilance among developers and users alike.

Key Takeaways

Active Exploitation: This vulnerability is being actively exploited by attackers. Immediate action is recommended.
Affected Systems: Bitwarden CLI version 2026.4.0
Action Required: Users should update to a secure version of Bitwarden CLI and review their systems for any signs of unauthorized access.
Timeline: Newly disclosed

Original Article Summary

Bitwarden CLI was hit by the Checkmarx supply chain attack. Version 2026.4.0 shipped malicious code in bw1.js via a compromised GitHub Action. Bitwarden CLI has been compromised as part of the ongoing Checkmarx supply chain campaign, researchers warn. The affected version, @bitwarden/cli 2026.4.0, contained malicious code hidden in the bw1.js file. The breach likely stemmed […]

Impact

Bitwarden CLI version 2026.4.0

Exploitation Status

This vulnerability is confirmed to be actively exploited by attackers in real-world attacks. Organizations should prioritize patching or implementing workarounds immediately.

Timeline

Newly disclosed

Remediation

Users should update to a secure version of Bitwarden CLI and review their systems for any signs of unauthorized access.

Additional Information

This threat intelligence is aggregated from trusted cybersecurity sources. For the most up-to-date information, technical details, and official vendor guidance, please refer to the original article linked below.

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