Malware in sitecore-mm-component-style
Malware discovered in the npm package sitecore-mm-component-style. Systems with this package installed are considered fully compromised and require immediate remediation.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- sitecore-mm-component-style
A malicious npm package named sitecore-mm-component-style has been identified and published to the npm registry. The package contains malware that grants full control of affected systems to an outside entity.\n\nAny computer with this package installed or running should be considered fully compromised. The GitHub Security Advisory (GHSA-mp9q-fvp5-ww2c) indicates critical severity and recommends immediate action.\n\nDue to the level of system compromise, removal of the package alone may not eliminate all malicious software that was installed as a result of the initial compromise.
Indicators of compromise
- Packages
- sitecore-mm-component-style
Remediation
- Immediately rotate all secrets and keys from a different, uncompromised computer
- Remove the sitecore-mm-component-style package from all affected systems
- Conduct a full security audit and forensic analysis of any system that had this package installed
- Monitor affected systems for signs of persistent compromise or backdoors
- Review npm package dependencies to identify how this package was introduced
- Consider rebuilding affected systems from clean media if full compromise is suspected
Sources
- GitHub Advisory GHSA-mp9q-fvp5-ww2c · GitHub Advisory Database
Cite this entry
"Malware in sitecore-mm-component-style." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 11, 2026; last updated June 11, 2026. https://supplychainattack.org/incident/malware-in-sitecore-mm-component-style-1xs58n
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