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Advisories

OpenClaw 2026.1.20 < 2026.2.1 - Missing Authentication in Browser Relay /cdp WebSocket Endpoint

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severity
high
date
Affecting

  • OpenClaw 2026.1.20 < 2026.2.1

CWE
  • CWE-306 Missing Authentication for Critical Function
CVSS
7.4
CVSS V4 Vector
CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:A/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
@johnatzeropath, @LeftenantZero, Yue (Knox) Liu (@yueyueL)
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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