Six Proto6 Vulnerabilities in protobuf.js Expose Node.js Apps to RCE and DoS
Source Reddit Cybersecurity
Mentioned vulnerabilities
Rated by Threat Radar
Data as of 10 Jun 2026, 06:41 UTC
What to do
AI-suggested
Official patches addressing these vulnerabilities are available in protobufjs versions 7.5.6 and 8.0.2, and protobufjs-cli versions 1.2.1 and 2.0.2. Users should promptly update to these fixed versions to protect against remote code execution and denial-of-service risks. No vendor advisory indicates that no action is required or that the issue is already mitigated; therefore, applying these updates is the recommended remediation step.
Discussion
Six vulnerabilities collectively called Proto6 have been identified in protobuf.js, a JavaScript/TypeScript implementation of Protocol Buffers used in Node.js applications. These flaws can lead to remote code execution (RCE) and denial-of-service (DoS) attacks by exploiting the library's default trust of schema and metadata inputs. The vulnerabilities affect protobuf.js versions <=7.5.5 and >=8.0.0 <=8.
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