CVE-2026-54271

Published Jun 22, 2026

Last updated 2 months ago

Overview

Description
protobufjs-cli is the command line add-on for protobuf.js. Prior to 1.3.2 and 2.5.0, a previous fix for unsafe name handling in pbjs static / static-module code generation was incomplete. Affected versions of protobufjs-cli could still emit unsafe JavaScript references when generating static output from crafted JSON descriptor input. The common case of parsing schemas from .proto files is not affected. This is a bypass of CVE-2026-44295. An attacker who can provide or influence pre-parsed JSON descriptors passed to pbjs static code generation may be able to cause generated JavaScript output to contain attacker-controlled code. The injected code may execute if the generated file is later executed or imported and an affected generated API path is invoked. This vulnerability is fixed in 1.3.2 and 2.5.0.
Source
security-advisories@github.com
NVD status
Analyzed
Products
protobufjs-cli

Risk scores

CVSS 3.1

Type
Secondary
Base score
8.2
Impact score
6
Exploitability score
1.6
Vector string
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:L
Severity
HIGH

Weaknesses

security-advisories@github.com
CWE-94

Social media

Hype score
Not currently trending

Configurations