Tech Optimizer
April 26, 2026
On April 21, 2026, compromised versions of pgserve (1.1.11, 1.1.12, and 1.1.13) were published on npm, containing a 1,143-line credential-harvesting script that executes during the postinstall phase of npm install. The malware functions as a supply-chain worm, reinjecting itself into other packages if it finds an npm publish token. Stolen credentials are encrypted using RSA-4096 and AES-256 and exfiltrated to a decentralized Internet Computer Protocol (ICP) canister. The last legitimate release was v1.1.10, published on April 17, 2026. The malware was detected by StepSecurity AI Package Analyst and Harden Runner, which flagged the compromised versions as Critical / Rejected and confirmed live exfiltration during analysis. The injected script performs operations such as harvesting environment variables, collecting filesystem secrets, encrypting payloads, and propagating to other npm packages and Python packages if a PyPI token is detected. The exfiltration domains have been added to a global block list.
