Improper Authorization in NanoClaw by nanocoai
CVE-2026-17434

5.3MEDIUM

Key Information:

Vendor

Nanocoai

Status
Nanoclaw
Vendor
CVE Published:
26 July 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-17434?

A flaw in the function handleAddMcpServer of NanoClaw, specifically in the file src/modules/self-mod/request.ts, allows for improper authorization. This vulnerability enables attackers to potentially manipulate access controls, leading to unauthorized actions. The vulnerability is remotely exploitable, and an exploit has been made public. To mitigate this security issue, it is essential to apply the provided patch, ensuring your system's safety.

Affected Version(s)

NanoClaw 2.0.0

NanoClaw 2.0.1

NanoClaw 2.0.2

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-2026-17434 - Proof of Concept

References

https://vuldb.com/vuln/383075
vdb-entrytechnical-description
https://vuldb.com/vuln/383075/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-17434
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

Erichen-x (VulDB User)
.