CVE-2026-44293— protobufjs: Code injection through bytes field defaults in generated toObject code
Possible ATT&CK Techniques 1AI
T1059 · Command and Scripting InterpreterAffected Version Matrix 2
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| protobufjs | protobuf.js | < 7.5.6 | affected |
>= 8.0.0, < 8.0.2 | affected |
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I. Basic Information for CVE-2026-44293
Vulnerability Information
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Vulnerability Title
protobufjs: Code injection through bytes field defaults in generated toObject code
Source: NVD (National Vulnerability Database)
Vulnerability Description
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.
Source: NVD (National Vulnerability Database)
CVSS Information
N/A
Source: NVD (National Vulnerability Database)
Vulnerability Type
对生成代码的控制不恰当(代码注入)
Source: NVD (National Vulnerability Database)
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 7.5.6之前版本和8.0.2之前版本存在代码注入漏洞，该漏洞源于toObject转换生成的JavaScript包含来自模式控制字节字段默认值的不安全表达式，可能导致攻击者控制的代码被注入生成的转换函数。
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 | < 7.5.6 | - |
II. Public POCs for CVE-2026-44293
| # | POC Description | Source Link | Shenlong Link |
|---|
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Same Patch Batch · protobufjs · 2026-05-13 · 10 CVEs total
| CVE-2026-44295 | 8.7 HIGH | protobufjs-cli: Code injection in pbjs static output from crafted schema names |
| 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-2026-44289 | 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
Same product: protobuf.js
- CVE-2026-44295
protobufjs-cli: Code injection in pbjs static output from cr - CVE-2026-42290
protobufjs-cli: OS Command Injection - CVE-2026-45740
protobufjs: Denial of Service via unbounded recursive JSON d - CVE-2026-44294
protobufjs: Denial of service from crafted field names in ge - CVE-2026-44292
protobufjs: Prototype injection in generated message constru
Same vendor: protobufjs
- CVE-2026-44295
protobufjs-cli: Code injection in pbjs static output from cr - CVE-2026-42290
protobufjs-cli: OS Command Injection - CVE-2026-45740
protobufjs: Denial of Service via unbounded recursive JSON d - CVE-2026-44294
protobufjs: Denial of service from crafted field names in ge - CVE-2026-44292
protobufjs: Prototype injection in generated message constru
Same weakness: CWE-94
V. Comments for CVE-2026-44293
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