Server-Side Request Forgery (SSRF) in OpenClaw - CVE-2026-28476
Published: May 4, 2026
Vulnerability identifier: #VU129476
CSH Severity: Low
CVSS v4.0: CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
CVE-ID: CVE-2026-28476
CWE-ID: CWE-918
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vendor: OpenClaw
Affected software:
OpenClaw
OpenClaw
Detailed vulnerability description
The vulnerability allows a remote user to induce the server to make HTTP requests to attacker-chosen hosts.
The vulnerability exists due to server-side request forgery (ssrf) in the Tlon (Urbit) extension authentication flow when constructing an outbound HTTP request from a user-provided base URL. A remote user can supply a crafted base URL to induce the server to make HTTP requests to attacker-chosen hosts.
Only deployments with the Tlon (Urbit) extension installed and configured are vulnerable, and exploitation requires the ability to influence the configured Urbit URL.
How to mitigate CVE-2026-28476
Install security update from vendor's website.