CVE-2026-94094

A flaw has been found in OpenClaw up to 2026.9.5. Affected is the function createCanvasHostHandler of the file extensions/canvas/src/host/server.ts of the component Canvas Host Route. Executing a manipulation can lead to denial of service. The attack can be launched remotely. The exploit has been published and may be used. Fix suggestion's "streaming/size-limit" was never shipped - latest 2026.9.5 still buffers the whole file via readFile() (src/canvas/serve.runtime.ts:17,114), unlike the sibling WS path which caps at 64KB. The vendor was contacted early about this disclosure.

CVSS v3 4.3 MEDIUM
CVSS v2.0 4.0 MEDIUM

4.3^/10

CVSS v3 : MEDIUM

Vector :

Exploitability : 2.8 / Impact : 1.4

Attack Vector NETWORK

Attack Complexity LOW

Privileges Required LOW

User Interaction NONE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact LOW

Scope UNCHANGED

4.0^/10

CVSS v2.0 : MEDIUM

Vector : AV:N/AC:L/Au:S/C:N/I:N/A:P

Exploitability : 8.0 / Impact : 2.9

Access Vector NETWORK

Access Complexity LOW

Authentication SINGLE

Confidentiality Impact NONE

Integrity Impact NONE

Availability Impact PARTIAL

References

Link	Resource
https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report
https://vuldb.com/cve/CVE-2026-94094
https://vuldb.com/submit/882009
https://vuldb.com/vuln/408023
https://vuldb.com/vuln/408023/cti

Configurations

No configuration.

History

20 Sep 2026, 23:17

Type	Values Removed	Values Added
New CVE

Information

Published : 2026-09-20 23:17

Updated : 2026-09-22 16:18

NVD link : CVE-2026-94094

Mitre link : CVE-2026-94094

CVE.ORG link : CVE-2026-94094

JSON object : View

Products Affected

No product.

CWE

CWE-404

Improper Resource Shutdown or Release

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