Denial of Service Vulnerability in OpenClaw's Canvas Host Route by OpenClaw
CVE-2026-94094

5.3MEDIUM

Key Information:

Vendor

OpenClaw

Status
Openclaw
Vendor
CVE Published:
20 September 2026

Badges

👾 Exploit Exists🟡 Public PoC

What is CVE-2026-94094?

A significant flaw exists in OpenClaw's Canvas Host Route, specifically in the createCanvasHostHandler function. This weakness can be exploited through remote manipulation, leading to a denial of service. The root cause lies in the handling of file reading, where the system buffers the entire file rather than implementing a size limit, unlike its counterpart in the WebSocket path. Despite notification to the vendor, the issue persists in the latest version, rendering installations vulnerable to potential remote attacks.

Affected Version(s)

OpenClaw 2026.9.0

OpenClaw 2026.9.1

OpenClaw 2026.9.2

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-2026-94094 - Proof of Concept

References

https://vuldb.com/vuln/408023
vdb-entrytechnical-description
https://vuldb.com/vuln/408023/cti
signaturepermissions-required
https://vuldb.com/cve/CVE-2026-94094
third-party-advisory

CVSS V4

Score:
5.3
Severity:
MEDIUM
Confidentiality:
None
Integrity:
None
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

pengguogood (VulDB User)
VulDB CNA Team
.