Malware in block-slot
The npm package block-slot was found to contain malware, resulting in full system compromise of any computer with the package installed or running. GitHub Security Advisory GHSA-pg29-x97h-gfr6 was published on 2026-06-25.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- block-slot
The npm package block-slot was identified as containing malware. According to the GitHub Security Advisory, any computer that has this package installed or running should be considered fully compromised.\n\nImmediate remediation is critical: all secrets and keys stored on affected computers should be rotated immediately from a different, uncompromised system. The package should be removed, though full system compromise means there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the initial compromise.\n\nThis represents a critical supply chain attack through a compromised npm package with potential for widespread impact across all systems where the package was deployed.
Indicators of compromise
- Packages
- block-slot
Remediation
- Immediately rotate all secrets and keys stored on affected computers from a different, uncompromised system
- Remove the block-slot package from all affected systems
- Conduct a full security audit and forensic analysis of any system that had block-slot installed
- Monitor affected systems for signs of persistent malware or unauthorized access
- Review and revoke any credentials or API keys that may have been exposed
- Consider full system reimaging if compromise is confirmed
Sources
- GitHub Advisory GHSA-pg29-x97h-gfr6 · GitHub Advisory Database
Cite this entry
"Malware in block-slot." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 25, 2026; last updated June 25, 2026. https://supplychainattack.org/incident/malware-in-block-slot-1diz0c
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