CVE-2026-94094 - OpenClaw Canvas Host Route server.ts createCanvasHostHandler denial of service

CVE-2026-94094 - OpenClaw Canvas Host Route server.ts createCanvasHostHandler denial of service

https://cvefeed.io/rssfeed/latest.atom / Mon, 09/21/2026 - 07:33
CVE ID :CVE-2026-94094
Published : Sept. 20, 2026, 11:17 p.m. | 5 hours, 52 minutes ago
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.
Severity: 4.3 | MEDIUM
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