CVE-2026-28458
Received Received - Intake
Unauthenticated WebSocket Access in OpenClaw Browser Relay Enables Data Theft

Publication date: 2026-03-05

Last updated on: 2026-03-09

Assigner: VulnCheck

Description
OpenClaw version 2026.1.20 prior to 2026.2.1 contains a vulnerability in the Browser Relay (extension must be installed and enabled) /cdp WebSocket endpoint in which it does not require authentication tokens, allowing websites to connect via loopback and access sensitive data. Attackers can exploit this by connecting to ws://127.0.0.1:18792/cdp to steal session cookies and execute JavaScript in other browser tabs.
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Meta Information
Published
2026-03-05
Last Modified
2026-03-09
Generated
2026-06-16
AI Q&A
2026-03-06
EPSS Evaluated
2026-06-15
NVD
CVE-2026-28458
EUVD
EUVD-2026-9906
Affected Vendors & Products
Showing 1 associated CPE
Vendor Product Version / Range
openclaw openclaw From 2026.1.20 (inc) to 2026.2.1 (exc)
Helpful Resources
Exploitability
CWE
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KEV
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CWE ID Description
CWE-306 The product does not perform any authentication for functionality that requires a provable user identity or consumes a significant amount of resources.
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Executive Summary

OpenClaw version 2026.1.20 prior to 2026.2.1 has a vulnerability in its Browser Relay /cdp WebSocket endpoint. This endpoint does not require authentication tokens, which means that any website can connect to it via the loopback interface (localhost).

By exploiting this, attackers can connect to ws://127.0.0.1:18792/cdp and gain access to sensitive data such as session cookies. They can also execute JavaScript in other browser tabs, potentially compromising the user's browser sessions.

Impact Analysis

This vulnerability can allow attackers to steal session cookies, which may lead to unauthorized access to user accounts or sensitive information.

Additionally, attackers can execute JavaScript in other browser tabs, which can be used to manipulate or hijack browser sessions, potentially leading to further compromise of user data or actions performed on behalf of the user.

Compliance Impact

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Detection Guidance

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Mitigation Strategies

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