Malicious code in string-format-kit (npm)
The npm package string-format-kit version 1.0.2 was identified as malicious by the OpenSSF Package Analysis project. The package communicates with domains associated with malicious activity and executes commands associated with malicious behavior.
- Disclosed
- Last updated
- Blast radius
- All npm users who installed string-format-kit version 1.0.2
- Ecosystems
- Attack vectors
- Affected entities
- string-format-kit · 1.0.2
The OpenSSF Package Analysis project identified string-format-kit version 1.0.2 on npm as containing malicious code. The analysis revealed that the package communicates with a domain associated with malicious activity and executes one or more commands associated with malicious behavior.\n\nThis finding was published on July 28, 2026, and credited to the OpenSSF malicious-packages repository. The malicious package was assigned identifier MAL-2026-11108.\n\nAny user who installed string-format-kit version 1.0.2 may have been affected by this malicious code execution.
Indicators of compromise
- Packages
- string-format-kit@1.0.2
Remediation
- Immediately uninstall string-format-kit version 1.0.2 from all affected systems
- Review npm audit logs and package-lock.json files to identify when and where this package was installed
- Scan systems that installed this package for signs of compromise, including unauthorized network connections and command execution
- Update to a safe version of string-format-kit if a legitimate version exists, or replace with an alternative package
- Review and rotate any credentials or sensitive data that may have been exposed on affected systems
Sources
- GitHub Advisory GHSA-xqqx-722m-55gr · GitHub Advisory Database
Cite this entry
"Malicious code in string-format-kit (npm)." supplychainattack.org, Supply Chain Attack Incident Catalog. Disclosed July 28, 2026; last updated July 28, 2026. https://supplychainattack.org/incident/malicious-code-in-string-format-kit-npm-8l830c
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