# CVE-2026-41242

> Vulnerability · severity: **CRITICAL** (CVSS 9.8).

## Description

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.

## Key facts

- **CVE ID:** CVE-2026-41242
- **Published:** 2026-04-18
- **CVSS severity:** CRITICAL
- **CVSS base score:** 9.8
- **CWE codes:** CWE-94

## Affected products

- `protobufjs_project:protobufjs`

## Primary sources

- NIST NVD: https://nvd.nist.gov/vuln/detail/CVE-2026-41242

## Citation

> AI Analytics. CVE-2026-41242. Retrieved 2026-07-20 from https://api.ai-analytics.org/cve/CVE-2026-41242. Derived from NIST NVD. Licensed CC0.

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