Bottom line: Six security vulnerabilities in protobuf.js allow remote code execution and denial-of-service attacks on Node.js systems.
Researchers have identified six weaknesses in the JavaScript library protobuf.js that enable attackers to remotely compromise or crash Node.js applications. The vulnerabilities can be exploited through manipulated Protobuf schemas or payloads.
The affected versions of protobuf.js — a JavaScript and TypeScript implementation of the Protocol Buffers standard — exhibit critical susceptibility. A single manipulated Protobuf schema, a prepared descriptor object, or a specially crafted payload is sufficient to trigger the weaknesses.
For CTOs, this represents an immediate risk in all Node.js applications that use protobuf.js for serialization and deserialization of structured data. The RCE scenarios (Remote Code Execution) are particularly critical, as they can grant an attacker complete control over the affected server. DoS variants, on the other hand, can lead to resource exhaustion or process crashes.
Affected organizations should update their dependencies to the latest patched version and conduct an audit of their Protobuf processing — especially where data from untrusted sources is handled. An immediate inventory of protobuf.js usage in the codebase is necessary to clarify the extent of exposure.
Source: thehackernews.com · Published June 10, 2026
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