CVE-2026-28458
OpenClaw 2026.1.20 < 2026.2.1 - Missing Authentication in Browser Relay /cdp WebSocket Endpoint
CVSS Score
8.1
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-306 |
| Vendor | openclaw |
| Product | openclaw |
| Published | Mar 5, 2026 |
| Last Updated | Mar 9, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
None
Affected Versions
OpenClaw / OpenClaw
2026.1.20 < 2026.2.1
References
github.com: https://github.com/openclaw/openclaw/security/advisories/GHSA-mr32-vwc2-5j6h github.com: https://github.com/openclaw/openclaw/commit/a1e89afcc19efd641c02b24d66d689f181ae2b5c vulncheck.com: https://www.vulncheck.com/advisories/openclaw-missing-authentication-in-browser-relay-cdp-websocket-endpoint
Credits
@johnatzeropath @LeftenantZero Yue (Knox) Liu (@yueyueL)