# CVE-2026-94094 — OpenClaw

> As of 2026-09-20, CVE-2026-94094 is a MEDIUM-severity vulnerability in OpenClaw, CVSS v3.1 4.3, EPSS 0.2% (19.5th percentile). No Threadlinqs-tracked threat campaign has been attributed to CVE-2026-94094 as of 2026-09-20; the identifier is re-checked against the Threadlinqs threat corpus on every daily ingest.

**Last updated:** 2026-09-20

## What is CVE-2026-94094?

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.

The record classifies CVE-2026-94094 under weakness class [CWE-404](https://cwe.mitre.org/data/definitions/404.html). Its CVSS v3 base vector states that the flaw is reachable remotely over the network, needs low-privilege credentials, needs no user interaction. 1 affected-product entry is recorded, across 1 vendor, listed below. The identifier was first published 15 days ago.

## Severity and exploitation probability

- **CVSS v3.1 base score:** 4.3 — MEDIUM (`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`)
- **CVSS v4.0 base score:** 5.3 (`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`)
- **EPSS (FIRST):** 0.2% probability of exploitation in the next 30 days, higher than 19.5% of all scored CVEs
- **CISA KEV:** Not listed in the CISA Known Exploited Vulnerabilities catalog
- **Threadlinqs priority:** 2.9/10 — a Threadlinqs composite of the CVSS base score, the EPSS percentile and public exploit availability
- **Published:** 2026-09-20

## Is CVE-2026-94094 being exploited?

It currently carries a trending score of 34 in the Threadlinqs vulnerability feed.

## Affected products and versions

- **(vendor unspecified)**: OpenClaw

## How to fix CVE-2026-94094

No vendor patch reference has been recorded for CVE-2026-94094 in the tracked sources. Follow the references below for a fix, and treat the products listed above as exposed until the vendor states otherwise.

## Threat activity tracking CVE-2026-94094

No threat campaign in the Threadlinqs corpus currently references CVE-2026-94094, in its CVE list or as an indicator. The linkage is recomputed from the live corpus on every daily ingest, so this section fills in as soon as a tracked campaign cites the identifier.

## Sources

Enriched from CVE.org, FIRST EPSS. Last verified by Threadlinqs on 2026-09-22.

**Exploit and proof of concept**

- [github.com — exploit](https://github.com/lche511/cve/tree/main/OpenClaw_Canvas_Big_GET_DoS_Report)

**Technical analysis**

- [vuldb.com — vdb entry](https://vuldb.com/vuln/408023)

**Third-party advisory**

- [vuldb.com — signature](https://vuldb.com/vuln/408023/cti)
- [vuldb.com — third party advisory](https://vuldb.com/cve/CVE-2026-94094)
- [vuldb.com — third party advisory (882009)](https://vuldb.com/submit/882009)

Canonical: https://intel.threadlinqs.com/cve/CVE-2026-94094
Full detection coverage and IOCs for threats exploiting CVE-2026-94094 via the Threadlinqs MCP server (Purple tier): https://intel.threadlinqs.com/mcp