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CVE-2026-81032— NebulaGraph through 3.8.0 Unauthenticated Read and Modification of Runtime Configuration

Quick assessment

Affected
vesoft-inc nebula
Exploitation
Public or AI PoC available; prioritize validation
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

NebulaGraph 通过一个未认证的 HTTP 服务暴露其运行时配置。每个守护进程都会启动在 中定义的 Web 服务，其绑定地址默认为所有网络接口，并注册了用于读写 gflags 以及查看状态和统计信息的处理程序。该服务及其路由均没有认证、令牌校验或地址限制。读处理程序会返回守护进程的完整运行时标志值，其中包括配置的证书、私钥和证书颁发机构路径、密码文件路径、数据目录以及传输安全相关的启用标志。写处理程序会解析传入的键值对，并通过 gflags 运行时设置函数应用每个条目，因此能够访问该端口的调用方可以在不重启

CVSS 9.8 · Critical

Affected Version Matrix 1

VendorProduct Version RangeStatus
vesoft-inc nebula ≤ 3.8.0 affected
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I. Basic Information for CVE-2026-81032

Vulnerability Information
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Vulnerability Title
NebulaGraph through 3.8.0 Unauthenticated Read and Modification of Runtime Configuration
Source: CVE Program / CVE List V5
Vulnerability Description
NebulaGraph exposes its runtime configuration over an unauthenticated HTTP service. Each daemon starts the web service defined in src/webservice/WebService.cpp, whose bind address defaults to all interfaces, and registers routes for reading and writing gflags alongside status and statistics. Neither the service nor its router carries any authentication, token check or address restriction. The read route returns the daemon's full set of runtime flag values, which includes the configured certificate, key and certificate-authority paths, the password file path, data directories and the transport-security enable flags. The write route parses a supplied map and applies each entry through the gflags runtime setter, so a caller able to reach the port can change the daemon's behaviour without restarting it, including disabling the transport-security flags, redirecting log files and altering flags such as failed_login_attempts and password_lock_time_in_secs. Public reports of this endpoint describe a single name, enable_authorize, being refused by the handler; at release 3.8.0 that refusal is not present and the handler applies every name it is given.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
关键功能的认证机制缺失
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
vesoft-inc nebula 0 ~ 3.8.0 -

II. Public POCs for CVE-2026-81032

# POC Description Source Link Shenlong Link
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Qwen3.6-35B-A3B · 6419 chars
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III. Intelligence Information for CVE-2026-81032

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Patches & Fixes for CVE-2026-81032 (1)

Vendor Advisories for CVE-2026-81032 (1)

Proof of Concept for CVE-2026-81032 (1)

Other References for CVE-2026-81032 (2)

IV. Related Vulnerabilities

Same product: nebula
Same weakness: CWE-306

V. Comments for CVE-2026-81032

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