Bitwarden CLI has been compromised as part of the newly discovered and ongoing Checkmarx supply chain campaign, according to new findings from Socket.
“The affected package version appears to be @bitwarden/cli@2026.4.0, and the malicious code was published in ‘bw1.js,’ a file included in the package contents,” the application security company said.
“The attack appears to have leveraged a compromised GitHub Action in Bitwarden’s CI/CD pipeline, consistent with the pattern seen across other affected repositories in this campaign.”
In a post on X, JFrog said the rogue version of the package “steals GitHub/npm tokens, .ssh, .env, shell history, GitHub Actions and cloud secrets, then exfiltrates the data to private domains and as GitHub commits.”
While the malicious version is no longer available for download from npm, Socket said the compromise follows the same GitHub Actions supply chain vector identified in the Checkmarx campaign.
As part of the effort, threat actors have been found abusing stolen GitHub tokens to inject a new GitHub Actions workflow that captures secrets available to the workflow run, and uses harvested npm credentials to push malicious versions of the package to read the malware to downstream users.
According to security researcher Adnan Khan, the threat actor is said to have used a malicious workflow to publish the malicious bitwarden CLI. “I believe this is the first time a package using NPM trusted publishing has been compromised,” Khan added.
It’s suspected that the threat actor known as TeamPCP is behind the latest attack aimed at Checkmarx. As of writing, TeamPCP’s X account has been suspended for violating the platform’s rules.
(This is a developing story. Please check for more details.)
