Missing Authorization in nextlevelbuilder GoClaw Affects Remote Accessibility
CVE-2026-16123

5.3MEDIUM

Key Information:

Vendor

Nextlevelbuilder

Status
Goclaw
Vendor
CVE Published:
18 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-16123?

A vulnerability has been identified in the nextlevelbuilder GoClaw product, specifically affecting versions up to 3.13.2. This issue resides in the ServeHTTP function of the tools_invoke.go file within the Invoke Endpoint component. The flaw results in missing authorization checks, allowing unauthorized users to access functionalities that should be restricted. The vulnerability can be exploited remotely, increasing the risk of attacks, as the exploit code has been made publicly available. Organizations using affected versions are urged to implement security measures immediately to mitigate potential risks.

Affected Version(s)

GoClaw 3.13.0

GoClaw 3.13.1

GoClaw 3.13.2

Exploit Proof of Concept (PoC)

PoC code is written by security researchers to demonstrate the vulnerability can be exploited. PoC code is also a key component for weaponization which could lead to ransomware.

CVE-2026-16123 - Proof of Concept

References

https://vuldb.com/vuln/379832
vdb-entrytechnical-description
https://vuldb.com/vuln/379832/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-16123
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
Low
Integrity:
Low
Availability:
Low
Attack Vector:
Network
Attack Complexity:
Low
Attack Required:
None
Privileges Required:
Undefined
User Interaction:
None

Timeline

  • 🟡

    Public PoC available

  • 👾

    Exploit known to exist

  • Vulnerability published

  • Vulnerability Reserved

Credit

Eric-g (VulDB User)
.