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CVE-2026-81032: Missing Authentication for Critical Function in vesoft-inc nebula

0
Critical
VulnerabilityCVE-2026-81032cvecve-2026-81032
Published: 08/26/2026 (08/26/2026, 15:45:00 UTC)
Source: CVE Database V5
Vendor/Project: vesoft-inc
Product: nebula

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.

CVSS v4.0

Score 9.3critical

Attack Vector
Network
Attack Complexity
Low
Attack Requirements
None
Privileges Required
None
User Interaction
None
Vuln. Confidentiality
High
Vuln. Integrity
High
Vuln. Availability
High
Subsq. Confidentiality
None
Subsq. Integrity
None
Subsq. Availability
None
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N

Affected software

GitHub Actionsmore threats →cve
nebula
pkg:github/nebula
Affected versions
<=3.8.0

Run on your own infrastructure? Check whether these packages are installed with threat-finder — our free open-source scanner.

Technical Details

Data Version
5.2
Assigner Short Name
VulnCheck
Date Reserved
2026-08-26T15:23:06.686Z
Cvss Version
4.0
State
PUBLISHED
Remediation Level
null

Threat ID: 6a8f0bddacd9273b4917df10

Added to database: 08/26/2026, 15:53:01 UTC

Last updated: 08/26/2026, 17:07:07 UTC

Views: 4

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