CVE-2026-44295— protobufjs-cli: Code injection in pbjs static output from crafted schema names
Quick assessment
Affected
protobufjs protobuf.js
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.
protobuf.js是The protobuf.js Project开源的一个纯 JavaScript 实现，具有对node.js和浏览器的TypeScript支持的协议缓冲区实现。它易于使用，速度极快，并且通过.proto文件可以开箱即用！ protobuf.js 1.2.1之前版本和2.0.2之前版本存在代码注入漏洞，该漏洞源于pbjs静态代码生成可能发出由模式控制名称派生的不安全JavaScript标识符，导致在生成静态JavaScript时未充分清理命名空间、枚举、服务或派生全名。
Possible ATT&CK Techniques 1 AI
T1195 · Supply Chain CompromiseAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| protobufjs | protobuf.js | >= 2.0.0, < 2.0.2 |
affected |
< 1.2.1 |
affected |
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I. Basic Information for CVE-2026-44295
Vulnerability Information
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Vulnerability Title
protobufjs-cli: Code injection in pbjs static output from crafted schema names
Source: CVE Program / CVE List V5
Vulnerability Description
protobufjs-cli is the command line add-on for protobuf.js. Prior to 1.2.1 and 2.0.2, pbjs static code generation could emit unsafe JavaScript identifiers derived from schema-controlled names. When generating static JavaScript from a crafted schema or JSON descriptor, certain namespace, enum, service, or derived full names could be written into the generated output without sufficient sanitization. This vulnerability is fixed in 1.2.1 and 2.0.2.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:L/UI:R/S:C/C:H/I:H/A:N
Source: CVE Program / CVE List V5
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: CVE Program / CVE List V5
Vulnerability Title
protobuf.js 代码注入漏洞
Source: CNNVD (China National Vulnerability Database)
Vulnerability Description
protobuf.js是The protobuf.js Project开源的一个纯 JavaScript 实现，具有对node.js和浏览器的TypeScript支持的协议缓冲区实现。它易于使用，速度极快，并且通过.proto文件可以开箱即用！ protobuf.js 1.2.1之前版本和2.0.2之前版本存在代码注入漏洞，该漏洞源于pbjs静态代码生成可能发出由模式控制名称派生的不安全JavaScript标识符，导致在生成静态JavaScript时未充分清理命名空间、枚举、服务或派生全名。
Source: CNNVD (China National Vulnerability Database)
CVSS Information
N/A
Source: CNNVD (China National Vulnerability Database)
Vulnerability Type
N/A
Source: CNNVD (China National Vulnerability Database)
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| protobufjs | protobuf.js | >= 2.0.0, < 2.0.2 | - |
|
II. Public POCs for CVE-2026-44295
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|---|
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Vendor Advisories for CVE-2026-44295 (1)
Same Patch Batch · protobufjs · 2026-05-13 · 10 CVEs total
| CVE-2026-44291 | 8.1 HIGH | protobufjs: Code generation gadget after prototype pollution |
| CVE-2026-42290 | 7.8 HIGH | protobufjs-cli: OS Command Injection |
| CVE-2026-44293 | 7.7 HIGH | protobufjs: Code injection through bytes field defaults in generated toObject code |
| CVE-2026-44289 | 7.5 HIGH | protobufjs: Denial of service through unbounded protobuf recursion |
| CVE-2026-44290 | 7.5 HIGH | protobufjs: Process-wide denial of service through unsafe option paths |
| CVE-2026-45740 | 5.3 MEDIUM | protobufjs: Denial of Service via unbounded recursive JSON descriptor expansion |
| CVE-2026-44288 | 5.3 MEDIUM | protobufjs: Overlong UTF-8 decoding |
| CVE-2026-44294 | 5.3 MEDIUM | protobufjs: Denial of service from crafted field names in generated code |
| CVE-2026-44292 | 5.3 MEDIUM | protobufjs: Prototype injection in generated message constructors |
IV. Related Vulnerabilities
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Same vendor: protobufjs
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Same weakness: CWE-94
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