CVE-2026-44295: Protobufjs Project Protobufjs-CLI

High severity, CVSS 8.7. EPSS: 0.4% chance of exploitation in the next 30 days.

protobufjs-cli is the command line add-on for protobuf.js. Prior to 1.2.1 and 2.0.2, pbjs static code generation could emit unsafe JavaScript identifiers derived from schema-controlled names. When generating static JavaScript from a crafted schema or JSON descriptor, certain namespace, enum, service, or derived full names could be written into the generated output without sufficient sanitization. This vulnerability is fixed in 1.2.1 and 2.0.2.

Affected products

• Protobufjs Project Protobufjs-CLI: before 1.2.1 (fixed in 1.2.1); from 2.0.0, before 2.0.2 (fixed in 2.0.2)

Published 2026-05-13. Last modified 2026-06-17.