CVE WatchSep 20, 2026

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/se

CVSS

4.3

Medium

EPSS

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KEV

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Exploit Today

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0-100

Published: Sep 20, 2026 · Last modified: Sep 20, 2026 · CWE-404

EPSS · 30d

Not enough EPSS history yet.

Technical description

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.

Official references

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