CVE-2026-44293

protobufjs compiles protobuf definitions into JavaScript (JS) functions. Prior to 7.5.6 and 8.0.2, protobufjs generated JavaScript for toObject conversion could include an unsafe expression derived from a schema-controlled bytes field default value. A crafted descriptor with a non-string default value for a bytes field could cause attacker-controlled code to be emitted into the generated conversion function. This vulnerability is fixed in 7.5.6 and 8.0.2.

CVSS v3 8.8 HIGH

8.8^/10

CVSS v3 : HIGH

Vector :

Exploitability : 2.8 / Impact : 5.9

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact HIGH

Integrity Impact HIGH

Availability Impact HIGH

Scope UNCHANGED

References

Link	Resource
https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-66ff-xgx4-vchm	Vendor Advisory Mitigation

Configurations

Configuration 1 (hide)

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

History

13 May 2026, 20:56

Type	Values Removed	Values Added
CVSS	v2 : ~~unknown~~ v3 : ~~unknown~~	v2 : unknown v3 : 8.8
CPE		cpe:2.3:a:protobufjs_project:protobufjs::::::node.js::*
References	~~() https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-66ff-xgx4-vchm -~~	() https://github.com/protobufjs/protobuf.js/security/advisories/GHSA-66ff-xgx4-vchm - Vendor Advisory, Mitigation
First Time		Protobufjs Project protobufjs Protobufjs Project

13 May 2026, 17:01

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-05-13 16:16

Updated : 2026-05-13 20:56

NVD link : CVE-2026-44293

Mitre link : CVE-2026-44293

CVE.ORG link : CVE-2026-44293

JSON object : View

Products Affected

protobufjs_project

protobufjs

CWE

CWE-94

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

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