GitHub Advisoryadvisory · npm
GHSA-pg2v-8xwh-qhcc OpenClaw affected by SSRF in optional Tlon (Urbit) extension authentication
MEDIUM
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
- https://github.com/openclaw/openclaw/security/advisories/GHSA-pg2v-8xwh-qhcc web
- https://nvd.nist.gov/vuln/detail/CVE-2026-28476 advisory
- https://github.com/openclaw/openclaw/commit/bfa7d21e997baa8e3437657d59b1e296815cc1b1 web
- https://github.com/openclaw/openclaw package
- https://github.com/openclaw/openclaw/releases/tag/v2026.2.14 web
- https://www.vulncheck.com/advisories/openclaw-server-side-request-forgery-in-tlon-extension-authentication web