CVE-2026-42290: Protobufjs Project Protobufjs-CLI

High severity, CVSS 7.8. EPSS: 0.2% 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, pbts invoked JSDoc by building a shell command string from input file paths and executing it through child_process.exec. File paths containing shell metacharacters could therefore be interpreted by the shell instead of being passed to JSDoc as plain arguments. 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.