{"dataType": "CVE_RECORD", "dataVersion": "5.2", "cveMetadata": {"cveId": "CVE-2026-94094", "assignerOrgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "state": "PUBLISHED", "assignerShortName": "VulDB", "dateReserved": "2026-09-20T09:07:39.802Z", "datePublished": "2026-09-20T23:00:14.987Z", "dateUpdated": "2026-09-20T23:00:14.987Z"}, "containers": {"cna": {"providerMetadata": {"orgId": "1af790b2-7ee1-4545-860a-a788eba489b5", "shortName": "VulDB", "dateUpdated": "2026-09-20T23:00:14.987Z"}, "title": "OpenClaw Canvas Host Route server.ts createCanvasHostHandler denial of service", "problemTypes": [{"descriptions": [{"type": "CWE", "cweId": "CWE-404", "lang": "en", "description": "Denial of Service"}]}], "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"]}], "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."}], "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"}}], "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"}], "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"]}], "x_generator": ["VulDB PVTS v202609"]}}}

{}

{"affected": [{"affectedData": [{"cpes": ["cpe:2.3:a:openclaw:openclaw:*:*:*:*:*:*:*:*"], "modules": ["Canvas Host Route"], "product": "OpenClaw", "vendor": "n/a", "versions": [{"status": "affected", "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"}]}], "source": "cna@vuldb.com"}], "cveTags": [], "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."}], "id": "CVE-2026-94094", "lastModified": "2026-09-20T23:17:03.530", "metrics": {"cvssMetricV2": [{"acInsufInfo": false, "baseSeverity": "MEDIUM", "cvssData": {"accessComplexity": "LOW", "accessVector": "NETWORK", "authentication": "SINGLE", "availabilityImpact": "PARTIAL", "baseScore": 4.0, "confidentialityImpact": "NONE", "integrityImpact": "NONE", "vectorString": "AV:N/AC:L/Au:S/C:N/I:N/A:P", "version": "2.0"}, "exploitabilityScore": 8.0, "impactScore": 2.9, "obtainAllPrivilege": false, "obtainOtherPrivilege": false, "obtainUserPrivilege": false, "source": "cna@vuldb.com", "type": "Secondary", "userInteractionRequired": false}], "cvssMetricV31": [{"cvssData": {"attackComplexity": "LOW", "attackVector": "NETWORK", "availabilityImpact": "LOW", "baseScore": 4.3, "baseSeverity": "MEDIUM", "confidentialityImpact": "NONE", "integrityImpact": "NONE", "privilegesRequired": "LOW", "scope": "UNCHANGED", "userInteraction": "NONE", "vectorString": "CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L", "version": "3.1"}, "exploitabilityScore": 2.8, "impactScore": 1.4, "source": "cna@vuldb.com", "type": "Primary"}], "cvssMetricV40": [{"cvssData": {"Automatable": "NOT_DEFINED", "Recovery": "NOT_DEFINED", "Safety": "NOT_DEFINED", "attackComplexity": "LOW", "attackRequirements": "NONE", "attackVector": "NETWORK", "availabilityRequirement": "NOT_DEFINED", "baseScore": 2.1, "baseSeverity": "LOW", "confidentialityRequirement": "NOT_DEFINED", "exploitMaturity": "PROOF_OF_CONCEPT", "integrityRequirement": "NOT_DEFINED", "modifiedAttackComplexity": "NOT_DEFINED", "modifiedAttackRequirements": "NOT_DEFINED", "modifiedAttackVector": "NOT_DEFINED", "modifiedPrivilegesRequired": "NOT_DEFINED", "modifiedSubAvailabilityImpact": "NOT_DEFINED", "modifiedSubConfidentialityImpact": "NOT_DEFINED", "modifiedSubIntegrityImpact": "NOT_DEFINED", "modifiedUserInteraction": "NOT_DEFINED", "modifiedVulnAvailabilityImpact": "NOT_DEFINED", "modifiedVulnConfidentialityImpact": "NOT_DEFINED", "modifiedVulnIntegrityImpact": "NOT_DEFINED", "privilegesRequired": "LOW", "providerUrgency": "NOT_DEFINED", "subAvailabilityImpact": "NONE", "subConfidentialityImpact": "NONE", "subIntegrityImpact": "NONE", "userInteraction": "NONE", "valueDensity": "NOT_DEFINED", "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/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X", "version": "4.0", "vulnAvailabilityImpact": "LOW", "vulnConfidentialityImpact": "NONE", "vulnIntegrityImpact": "NONE", "vulnerabilityResponseEffort": "NOT_DEFINED"}, "source": "cna@vuldb.com", "type": "Secondary"}]}, "published": "2026-09-20T23:17:03.530", "references": [{"source": "cna@vuldb.com", "url": "https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/cve/CVE-2026-94094"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/submit/882009"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/408023"}, {"source": "cna@vuldb.com", "url": "https://vuldb.com/vuln/408023/cti"}], "sourceIdentifier": "cna@vuldb.com", "vulnStatus": "Received", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-404"}], "source": "cna@vuldb.com", "type": "Primary"}]}

{}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2026.9.0"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2026.9.1"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2026.9.2"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2026.9.3"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2026.9.4"}}, {"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "2026.9.5"}}], "enrichment": {"confidence": 95.0, "confidence_source": "inferred", "scores": [{"score": 95.0, "source": "inferred"}, {"score": 100.0, "source": "matching"}]}, "original": {"product": "OpenClaw", "source": "cna", "vendor": "n/a"}, "product": "openclaw", "vendor": "openclaw"}], "created": "2026-09-21T00:30:06.572046+00:00", "updated": "2026-09-21T01:00:08.028747+00:00", "vendors": ["openclaw", "openclaw$PRODUCT$openclaw"]}