{"id":"CVE-2026-94094","title":"A flaw has been found in OpenClaw up to 2026.9.5","summary":"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 servic…","severity":"medium","cvss":4.3,"cvssVector":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L","cwe":["CWE-404"],"product":"OpenClaw","affected":["OpenClaw 2026.9.0","OpenClaw 2026.9.1","OpenClaw 2026.9.2","OpenClaw 2026.9.3","OpenClaw 2026.9.4","OpenClaw 2026.9.5"],"published":"2026-09-20","updated":"2026-09-21","sourceUpdated":"2026-09-21T13:33:33.387","source":"NVD","sourceUrl":"https://nvd.nist.gov/vuln/detail/CVE-2026-94094","references":[{"url":"https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report","label":"cna@vuldb.com"},{"url":"https://vuldb.com/cve/CVE-2026-94094","label":"cna@vuldb.com"},{"url":"https://vuldb.com/submit/882009","label":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/408023","label":"cna@vuldb.com"},{"url":"https://vuldb.com/vuln/408023/cti","label":"cna@vuldb.com"}],"tags":["nvd","cve.org"],"epss":0.00271,"epssPercentile":0.19525,"ingestedAt":"2026-09-20T23:28:09.528Z","slug":"CVE-2026-94094","body":"## Overview\n\nA 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.\n\n## Remediation\n\nRefer to the linked advisories for vendor-supplied fixes and affected version ranges.","depth":"sunlit","depthScore":24,"depthScoreParts":{"impact":23.7,"likelihood":0.1,"exploitation":0,"ransomware":0},"changes":[]}