What is CVE-2026-42290?

CVE-2026-42290 is a high-severity vulnerability in Protobufjs Protobuf.js, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-05-13.

How severe is CVE-2026-42290?

High severity. CVSS v3 base score is 7.8 out of 10.

RCE in Protobufjs Protobuf.js

CVE-2026-42290

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 metac…

Vulnerability class: Command Injection (OS Command Injection)

EPSS: 0.000 (6.4th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 7.8 (High). Vector: CVSS:3.1/AV:L/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Protobufjs Protobuf.js — versions >= 2.0.0, < 2.0.2, < 1.2.1
Protobufjs_project Protobufjs-cli

Weakness classification (CWE)

CWE-78 — OS Command Injection

References

security-advisories@github.com (x_refsource_CONFIRM, Vendor Advisory)

Frequently asked questions

What is CVE-2026-42290?: CVE-2026-42290 is a high-severity vulnerability in Protobufjs Protobuf.js, classified under OS Command Injection. CVSS score: 7.8/10. Published 2026-05-13.
How severe is CVE-2026-42290?: High severity. CVSS v3 base score is 7.8 out of 10.