CVE-2026-32064: OpenClaw < 2026.2.21 - Missing VNC Authentication in Sandbox Browser noVNC Observer

Severity: critical (CVSS 9.1 v3.1)
Exploited in the wild: not listed in CISA KEV
EPSS: 0.5% probability of exploitation in the next 30 days
Public exploit or detection template: none known
Published: 2026-03-21 · updated 2026-10-08
Weakness: CWE-306

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.

Affected products

OpenClaw: before 2026.2.21 — fixed in 2026.2.21

How to fix

Upgrade to a fixed version: OpenClaw 2026.2.21. Check the vendor advisory for mitigations.

References

https://github.com/openclaw/openclaw/commit/621d8e1312482f122f18c43c72c67211b141da01
https://github.com/openclaw/openclaw/commit/8c1518f0f3e0533593cd2dec3a46c9b746753661
https://github.com/openclaw/openclaw/security/advisories/GHSA-25gx-x37c-7pph
https://www.vulncheck.com/advisories/openclaw-missing-vnc-authentication-in-sandbox-browser-novnc-observer

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