CVE-2026-54271

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.

CVSS v3 8.2 HIGH

8.2^/10

CVSS v3 : HIGH

Vector :

Exploitability : 1.6 / Impact : 6.0

Attack Vector NETWORK

Attack Complexity HIGH

Privileges Required NONE

User Interaction REQUIRED

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact LOW

Scope CHANGED

References

Link	Resource
https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-pr59-h9ph-3fr8	Mitigation Vendor Advisory

Configurations

Configuration 1 (hide)

OR	cpe:2.3:a:protobufjs_project:protobufjs-cli::::::node.js::*
	cpe:2.3:a:protobufjs_project:protobufjs-cli::::::node.js::*

History

24 Jun 2026, 20:38

Type	Values Removed	Values Added
References	~~() https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-pr59-h9ph-3fr8 -~~	() https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-pr59-h9ph-3fr8 - Mitigation, Vendor Advisory
First Time		Protobufjs Project protobufjs-cli Protobufjs Project
CPE		cpe:2.3:a:protobufjs_project:protobufjs-cli::::::node.js::*

22 Jun 2026, 18:16

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-06-22 18:16

Updated : 2026-06-24 20:38

NVD link : CVE-2026-54271

Mitre link : CVE-2026-54271

CVE.ORG link : CVE-2026-54271

JSON object : View

Products Affected

protobufjs_project

protobufjs-cli

CWE

CWE-94

Improper Control of Generation of Code ('Code Injection')

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