Code Injection Vulnerability in Protobuf.js Command Line Tool
CVE-2026-54271

8.2HIGH

Key Information:

Vendor

Protobufjs

Status
Protobufjs-cli
Vendor
CVE Published:
22 June 2026

What is CVE-2026-54271?

The protobufjs-cli, a command line interface for protobuf.js, has a vulnerability due to incomplete fixes for unsafe name handling in static module code generation. Versions before 1.3.2 and 2.5.0 can generate unsafe JavaScript output from specially crafted JSON descriptors, allowing an attacker to inject harmful code that may execute when the generated file is invoked. It is crucial for developers and users to upgrade to the fixed versions to mitigate this risk.

Affected Version(s)

protobufjs-cli < 1.3.2 < 1.3.2

protobufjs-cli >= 2.0.0, < 2.4.2 < 2.0.0, 2.4.2

References

https://github.com/protobufjs/protobuf.js/security/adviso...
x_refsource_CONFIRM

CVSS V3.1

Score:
8.2
Severity:
HIGH
Confidentiality:
High
Integrity:
High
Availability:
High
Attack Vector:
Network
Attack Complexity:
High
Privileges Required:
None
User Interaction:
Required
Scope:
Changed

Timeline

  • Vulnerability published

  • Vulnerability Reserved

.