CVE-2026-101881

Received Received - Intake

OpenClaw Windows Node Memory Exhaustion via WebSocket Frames

Publication date: 2026-09-30

Last updated on: 2026-09-30

Assigner: VulnCheck

Description

OpenClaw Windows Node before 2026.7.1 contains an allocation of resources without limits vulnerability in the gateway WebSocket transport that allows connected gateways to exhaust node memory. Attackers can send an unending sequence of WebSocket continuation frames without EndOfMessage to cause unbounded memory growth until the node process crashes.

CVSS Scores

EPSS Scores

Probability:
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Meta Information

Published

2026-09-30

Last Modified

2026-09-30

Generated

2026-10-01

AI Q&A

2026-10-01

EPSS Evaluated

N/A

NVD

CVE-2026-101881

EUVD

EUVD-2026-90254

Affected Vendors & Products

Vendor	Product	Version / Range
openclaw	windows_node	to 2026.7.1 (exc)

Helpful Resources

Exploitability

CWE

KEV

CWE ID	Description
CWE-770	The product allocates a reusable resource or group of resources on behalf of an actor without imposing any intended restrictions on the size or number of resources that can be allocated.

Attack-Flow Graph

Executive Summary

OpenClaw Windows Node before 2026.7.1 has a vulnerability where attackers can send endless WebSocket continuation frames without an EndOfMessage flag. This causes the node to allocate unlimited memory, leading to a crash due to unbounded memory growth.

Detection Guidance

Monitor for abnormal memory usage on OpenClaw Windows Node processes. Check for WebSocket connections sending continuous frames without EndOfMessage flags. Use network monitoring tools like Wireshark to inspect WebSocket traffic for unusually large or fragmented messages.

Impact Analysis

This vulnerability allows attackers to crash the OpenClaw Windows Node process by exhausting its memory. This can disrupt services relying on the node, cause downtime, and potentially affect other software running on the same machine.

Mitigation Strategies

Update OpenClaw Windows Node to version 2026.7.1 or later. If updating is not immediately possible, restrict WebSocket connections to trusted gateways and implement network-level rate limiting to prevent unbounded frame sequences.

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