{"id":"CVE-2026-94094","published":"2026-09-20T23:17:03.530","lastModified":"2026-09-21T13:33:33.387","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.","cvssScore":4.3,"cvssSeverity":"MEDIUM","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","cwes":["CWE-404"],"vendors":[],"products":[],"references":[{"url":"https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report","tags":[]},{"url":"https://vuldb.com/cve/CVE-2026-94094","tags":[]},{"url":"https://vuldb.com/submit/882009","tags":[]},{"url":"https://vuldb.com/vuln/408023","tags":[]},{"url":"https://vuldb.com/vuln/408023/cti","tags":[]}],"exploitRefs":[{"url":"https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report","tags":[]}],"hasPoc":true,"ai":null}