GitHub Advisoryadvisory · npm

GHSA-pg2v-8xwh-qhcc OpenClaw affected by SSRF in optional Tlon (Urbit) extension authentication

MEDIUM Published 2026-02-18 Modified 2026-04-27 Official page ↗
Aliases
CVE-2026-28476
Ecosystem
npm
Packages
openclaw
Severity
Moderate
CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L
Weaknesses
CWE-918
Reviewed
2026-02-18

Affected packages

• npm openclaw: < 2026.2.14 → fixed in 2026.2.14

Description

Summary The optional Tlon (Urbit) extension previously accepted a user-provided base URL for authentication and used it to construct an outbound HTTP request, enabling server-side request forgery (SSRF) in affected deployments. Impact This only affects deployments that have installed and configured the Tlon (Urbit) extension, and where an attacker can influence the configured Urbit URL. Under those conditions, the gateway could be induced to make HTTP requests to attacker-chosen hosts (including internal addresses). Deployments that do not use the Tlon extension, or where untrusted users cannot change the Urbit URL, are not impacted. Affected Packages / Versions • Package: `openclaw` (npm) • Affected versions: `<= 2026.2.13` Fixed Versions • `2026.2.14` (planned next release) Fix Commit(s) • `bfa7d21e997baa8e3437657d59b1e296815cc1b1` Details Urbit authentication now validates and normalizes the base URL and uses an SSRF guard that blocks private/internal hosts by default (opt-in: `channels.tlon.allowPrivateNetwork`). Release Process Note This advisory is pre-populated with the planned patched version (`2026.2.14`). After `[email protected]` is published to npm, publish this advisory without further edits. Thanks @p80n-sec for reporting.

Related

Alias · CVE (1)

  • CVE-2026-28476 OpenClaw versions prior to 2026.2.14 contain a server-side request forgery vulnerability in the optional Tlon Urbit extension that accepts… vulnerability

Weakness · CWE (1)

  • CWE-918 Server-Side Request Forgery weakness

References