Vulnerability in NanoClaw's Attachment Handler Affects Remote File Access
CVE-2026-90807

5.3MEDIUM

Key Information:

Vendor

Nanocoai

Status
Nanoclaw
Vendor
CVE Published:
14 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-90807?

A critical vulnerability was identified in the NanoClaw Attachment Handler, specifically in the function forwardAttachedFiles located in the agent-route.ts file. This flaw allows attackers to manipulate link following mechanisms, leading to unauthorized remote file access. Given that the exploit has been made public, it is essential for users to apply the available patch (commit id: 3f9ed607b7e7a4872747295f75286f1c377d7c33) promptly to mitigate potential risks.

Affected Version(s)

NanoClaw 2.1.0

NanoClaw 2.1.1

NanoClaw 2.1.2

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-2026-90807 - Proof of Concept

References

https://vuldb.com/vuln/403309
vdb-entrytechnical-description
https://vuldb.com/vuln/403309/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-90807
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-a (VulDB User)
.