Malware in jsonfb
Malware was discovered in the npm package jsonfb, resulting in full system compromise of any computer with the package installed or running. All secrets and keys on affected systems should be rotated immediately from a different computer.
- Disclosed
- Last updated
- Blast radius
- Any system with jsonfb installed or running
- Ecosystems
- Attack vectors
- Affected entities
- jsonfb
A critical malware incident was identified in the npm package jsonfb. According to the GitHub Advisory (GHSA-86qc-ppwg-mgcj), any computer that has this package installed or running should be considered fully compromised.\n\nThe advisory recommends that all secrets and keys stored on affected computers be rotated immediately from a different, uncompromised system. While the package should be removed, there is no guarantee that removal will eliminate all malicious software that may have been installed as a result of the compromise, given that the outside entity may have gained full control of the system.\n\nUsers should treat any system that has run jsonfb as potentially fully compromised and take appropriate incident response measures.
Indicators of compromise
- Packages
- jsonfb
Remediation
- Immediately rotate all secrets, API keys, and credentials from a different, uncompromised computer
- Remove the jsonfb package from all affected systems
- Conduct a full security audit and forensic analysis of any system that had jsonfb installed
- Monitor affected systems for signs of persistent malware or unauthorized access
- Consider rebuilding affected systems from clean media if full compromise is suspected
Sources
- GitHub Advisory GHSA-86qc-ppwg-mgcj · GitHub Advisory Database
Cite this entry
"Malware in jsonfb." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 14, 2026; last updated July 14, 2026. https://supplychainattack.org/incident/malware-in-jsonfb-1p3y0o
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