Malware in rs-biginteger
Malware was discovered in the npm package rs-biginteger, resulting in full system compromise for any computer with the package installed or running. The advisory recommends immediate removal of the package and rotation of all secrets and keys from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with the package installed or running
- Ecosystems
- Attack vectors
- Affected entities
- rs-biginteger
The npm package rs-biginteger was found to contain malware. According to the GitHub Security Advisory (GHSA-xm5w-w96q-42f3), any computer that has this package installed or running should be considered fully compromised.\n\nThe advisory indicates that all secrets and keys stored on affected computers should be rotated immediately from a different, uncompromised system. While the package should be removed, the advisory notes that full control of the computer may have been given to an outside entity, meaning there is no guarantee that removing the package will remove all malicious software resulting from the installation.\n\nThis represents a critical supply chain attack through a compromised npm package with potential for widespread impact across all systems where it was installed.
Indicators of compromise
- Packages
- rs-biginteger
Remediation
- Remove the rs-biginteger package immediately from all affected systems
- Rotate all secrets, keys, and credentials from a different, uncompromised computer
- Assume full system compromise and conduct a thorough security audit
- Monitor affected systems for signs of unauthorized access or persistence mechanisms
- Consider rebuilding affected systems from clean media if possible
Sources
- GitHub Advisory GHSA-xm5w-w96q-42f3 · GitHub Advisory Database
Cite this entry
"Malware in rs-biginteger." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed June 30, 2026; last updated June 30, 2026. https://supplychainattack.org/incident/malware-in-rs-biginteger-1iogc2
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