Vulnerability · Published Mar 5, 2026 · Assigned by VulnCheck

CVE-2026-28458OpenClaw 2026.1.20 < 2026.2.1 - Missing Authentication in Browser Relay /cdp WebSocket Endpoint

High 8.1

In plain English

A high-severity missing authentication in OpenClaw from OpenClaw. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.4% (higher than 29% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 3.1)8.1High

Exploit odds (30 days)0.4%top 71.1% of all CVEs

Exploited in the wildNo reportsCISA SSVC: none

Attack toolingNoneno public tooling known

Official 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.

Affected packages & fixed versions

Ecosystem	Package	Fixed in	Advisory
npm	moltbot	no fix listed	GHSA-mr32-vwc2-5j6h
npm	openclaw	2026.2.1	GHSA-mr32-vwc2-5j6h

Affected products (as reported)

Vendor	Product	Versions
OpenClaw	OpenClaw	2026.1.20 – before 2026.2.1

Weakness: CWE-306 · Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:N

References

GitHub Security Advisory (GHSA-mr32-vwc2-5j6h) vendor-advisory
Patch Commit patch
VulnCheck Advisory: OpenClaw 2026.1.20 < 2026.2.1 - Missing Authentication in Browser Relay /cdp WebSocket Endpoint third-party-advisory