CVE-2026-89418— Uncontrolled Recursion leading to Denial of Service in protobuf-javascript (google-protobuf)
Quick assessment
Affected
Google protobuf-javascript (aka google-protobuf npm package)
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.
google-protobuf 在解析未知的 protobuf group 字段时存在无界递归漏洞。攻击者可以向任何调用生成的 API 的 Node.js 服务发送一个包含深度嵌套的 START_GROUP 线格式（wire format）字节的特制小型载荷，从而触发 （最大调用栈大小超出）错误，导致进程崩溃。该攻击无需身份认证，也不需要对数据模式（schema）有先验知识。
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I. Basic Information for CVE-2026-89418
Vulnerability Information
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Vulnerability Title
Uncontrolled Recursion leading to Denial of Service in protobuf-javascript (google-protobuf)
Source: CVE Program / CVE List V5
Vulnerability Description
google-protobuf contains an unbounded recursion when parsing unknown protobuf group fields. An attacker can send a small crafted payload of deeply nested START_GROUP wire bytes to any Node.js service that calls the generated deserializeBinary() API, causing a RangeError: Maximum call stack size exceeded and crashing the process. No authentication or prior knowledge of the schema is required.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Source: CVE Program / CVE List V5
Vulnerability Type
未经控制的递归
Source: CVE Program / CVE List V5
Affected Products
| Vendor | Product | Affected Versions | CPE | Subscribe |
|---|---|---|---|---|
| protobuf-javascript (aka google-protobuf npm package) | All versions | - |
|
II. Public POCs for CVE-2026-89418
| # | POC Description | Source Link | Shenlong Link |
|---|
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Vendor Advisories for CVE-2026-89418 (1)
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V. Comments for CVE-2026-89418
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