CVE-2026-41242 PUBLISHED

protobufjs has an arbitrary code execution issue

Assigner: GitHub_M
Reserved: 18.04.2026 Published: 18.04.2026 Updated: 18.04.2026

protobufjs compiles protobuf definitions into JavaScript (JS) functions. In versions prior to 8.0.1 and 7.5.5, attackers can inject arbitrary code in the "type" fields of protobuf definitions, which will then execute during object decoding using that definition. Versions 8.0.1 and 7.5.5 patch the issue.

Metrics

CVSS 4.0

CVSS Vector: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H
CVSS Score: 9.4

Exploitability Metrics		Vulnerable System Impact Metrics		Subsequent System Impact Metrics
Attack Vector	Network	Confidentiality	High	Confidentiality	High
Attack Complexity	Low	Integrity	High	Integrity	High
Attack Requirements	None	Availability	High	Availability	High
Privileges Required	Low
User Interaction	None

CVSS 4.0

Product Status

Vendor	protobufjs
Product	protobuf.js
Versions	Version < 7.5.5 is affected Version >= 8.0.0-experimental, < 8.0.1 is affected

References

Problem Types

CWE-94: Improper Control of Generation of Code ('Code Injection') CWE