Vulnerability · Published May 13, 2026 · Assigned by GitHub_M

CVE-2026-42290protobufjs-cli: OS Command Injection

High 7.8

In plain English

A high-severity OS command injection in protobuf.js from protobufjs. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.1% (higher than 3% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)7.8High

Exploit odds (30 days)0.1%top 97.2% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official description

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 packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	protobufjs-cli	1.2.1	GHSA-f84p-cvgm-xgjj
npm	protobufjs-cli	2.0.2	GHSA-f84p-cvgm-xgjj

Affected products (as reported)

Vendor	Product	Versions
protobufjs	protobuf.js	>= 2.0.0, < 2.0.2< 1.2.1

Weakness: CWE-78 · Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

References

https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-f84p-cvgm-xgjj x_refsource_CONFIRM