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Advisories

OpenClaw < 2026.2.21 - Missing VNC Authentication in Sandbox Browser noVNC Observer

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severity
high
date
Affecting

  • OpenClaw < 2026.2.21

CWE
  • CWE-306 Missing Authentication for Critical Function
CVSS
8.5
CVSS V4 Vector
CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N
Credit
Rafael M (@TerminalsandCoffee)
Description
OpenClaw versions prior to 2026.2.21 sandbox browser entrypoint launches x11vnc without authentication for noVNC observer sessions, allowing unauthenticated access to the VNC interface. Remote attackers on the host loopback interface can connect to the exposed noVNC port to observe or interact with the sandbox browser without credentials.

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