CVE-2026-94094
mediumA flaw has been found in OpenClaw up to 2026.9.5.
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.
CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:N/I:N/A:L Affected products
Not reported by the source (unknown — not "none").
Weakness classification (CWE)
Source: NVD / CISA. “NVD-CWE-Other” and “NVD-CWE-noinfo” mean NVD could not assign a specific weakness.
Mitigation & advisories
No vendor advisory or patch reference tagged by NVD. Check the references below.
References
- https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report cna@vuldb.com
- https://vuldb.com/cve/CVE-2026-94094 cna@vuldb.com
- https://vuldb.com/submit/882009 cna@vuldb.com
- https://vuldb.com/vuln/408023 cna@vuldb.com
- https://vuldb.com/vuln/408023/cti cna@vuldb.com