{"id":"CVE-2026-94094","state":"PUBLISHED","title":"OpenClaw Canvas Host Route server.ts createCanvasHostHandler denial of service","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.","publishedAt":"2026-09-20T23:00:14.987Z","updatedAt":"2026-09-22T15:41:58.927Z","severity":{"score":5.3,"label":"Medium","version":"4.0","vector":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","source":"VulDB"},"assigner":"VulDB","products":["n/a OpenClaw"],"affected":[{"vendor":"n/a","product":"OpenClaw","versions":[{"version":"2026.9.0","status":"affected"},{"version":"2026.9.1","status":"affected"},{"version":"2026.9.2","status":"affected"},{"version":"2026.9.3","status":"affected"},{"version":"2026.9.4","status":"affected"},{"version":"2026.9.5","status":"affected"}],"cpes":["cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:*:*:*"],"modules":["Canvas Host Route"]}],"references":["https://vuldb.com/vuln/408023","https://vuldb.com/vuln/408023/cti","https://vuldb.com/cve/CVE-2026-94094","https://vuldb.com/submit/882009","https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report"],"weaknesses":["CWE-404"],"ingestedAt":"2026-10-29T20:13:34.582Z","source":{"repository":"CVEProject/cvelistV5","path":"cves/2026/94xxx/CVE-2026-94094.json","commit":"556c9d3a8cd17e218bb8e452ba7cd619a384ff47"},"raw":{"dataType":"CVE_RECORD","dataVersion":"5.2","cveMetadata":{"cveId":"CVE-2026-94094","state":"PUBLISHED","datePublished":"2026-09-20T23:00:14.987Z","dateUpdated":"2026-09-22T15:41:58.927Z","assignerShortName":"VulDB","assignerOrgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateReserved":"2026-09-20T09:07:39.802Z"},"containers":{"cna":{"title":"OpenClaw Canvas Host Route server.ts createCanvasHostHandler denial of service","descriptions":[{"lang":"en","value":"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."}],"affected":[{"vendor":"n/a","product":"OpenClaw","versions":[{"version":"2026.9.0","status":"affected"},{"version":"2026.9.1","status":"affected"},{"version":"2026.9.2","status":"affected"},{"version":"2026.9.3","status":"affected"},{"version":"2026.9.4","status":"affected"},{"version":"2026.9.5","status":"affected"}],"cpes":["cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:*:*:*"],"modules":["Canvas Host Route"]}],"references":[{"url":"https://vuldb.com/vuln/408023","name":"VDB-408023 | OpenClaw Canvas Host Route server.ts createCanvasHostHandler denial of service","tags":["vdb-entry","technical-description"]},{"url":"https://vuldb.com/vuln/408023/cti","name":"VDB-408023 | CTI Indicators (IOB, IOC, TTP, IOA)","tags":["signature","permissions-required"]},{"url":"https://vuldb.com/cve/CVE-2026-94094","name":"CVE-2026-94094 | CVE Analysis and Report","tags":["third-party-advisory"]},{"url":"https://vuldb.com/submit/882009","name":"Submit #882009 | OpenClaw openclaw@2026.6.11 Denial of Service","tags":["third-party-advisory"]},{"url":"https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report","tags":["exploit"]}],"metrics":[{"cvssV4_0":{"version":"4.0","baseScore":5.3,"vectorString":"CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:P","baseSeverity":"MEDIUM"}},{"cvssV3_1":{"version":"3.1","baseScore":4.3,"vectorString":"CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","baseSeverity":"MEDIUM"}},{"cvssV3_0":{"version":"3.0","baseScore":4.3,"vectorString":"CVSS:3.0/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L/E:P/RL:X/RC:R","baseSeverity":"MEDIUM"}},{"cvssV2_0":{"version":"2.0","baseScore":4,"vectorString":"AV:N/AC:L/Au:S/C:N/I:N/A:P/E:POC/RL:ND/RC:UR"}}],"problemTypes":[{"descriptions":[{"cweId":"CWE-404","type":"CWE","lang":"en","description":"Denial of Service"}]}],"providerMetadata":{"shortName":"VulDB","orgId":"1af790b2-7ee1-4545-860a-a788eba489b5","dateUpdated":"2026-09-20T23:00:14.987Z"},"timeline":[{"time":"2026-09-20T00:00:00.000Z","lang":"en","value":"Advisory disclosed"},{"time":"2026-09-20T02:00:00.000Z","lang":"en","value":"VulDB entry created"},{"time":"2026-09-20T11:12:49.000Z","lang":"en","value":"VulDB entry last update"}],"credits":[{"lang":"en","value":"pengguogood (VulDB User)","type":"reporter"},{"lang":"en","value":"VulDB CNA Team","type":"coordinator"}],"x_generator":["VulDB PVTS v202609"]},"adp":[{"title":"CISA ADP Vulnrichment","metrics":[{"other":{"type":"ssvc","content":{"timestamp":"2026-09-22T15:30:11.647018Z","id":"CVE-2026-94094","options":[{"Exploitation":"poc"},{"Automatable":"no"},{"Technical Impact":"partial"}],"role":"CISA Coordinator","version":"2.0.3"}}}],"providerMetadata":{"shortName":"CISA-ADP","orgId":"134c704f-9b21-4f2e-91b3-4a467353bcc0","dateUpdated":"2026-09-22T15:41:58.927Z"}}]}}}