CVE-2026-28476: Openclaw OpenClaw Affected By SSRF Vulnerability

MODERATE
Advisory Identifier: GHSA-pg2v-8xwh-qhcc
Share
CVSS 8.3
CWE-918
Published
Advisory Summary

CVE-2026-28476 is a MODERATE (CVSS 8.3) openclaw affected by ssrf vulnerability (CWE-918: Server-Side Request Forgery (SSRF)) affecting Openclaw libraries in the npm ecosystem. The issue involves openclaw affected by ssrf in optional tlon (urbit) extension authentication. Remediation is available by upgrading affected packages to version 2026.2.14.

CVE-2026-28476 at a Glance

CVE Identifier CVE-2026-28476
GHSA Identifier GHSA-pg2v-8xwh-qhcc
Severity MODERATE
CVSS v3.1 Base Score 8.3
CWE Classification CWE-918: Server-Side Request Forgery (SSRF)
Affected Product Openclaw
Package Ecosystem npm
Published Date
Last Updated

Security Impact

CVSS: 8.3

The security impact metrics below are parsed directly from the CVSS v3.1 vector string (CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L).

Attack Vector Network (AV:N)
Attack Complexity Low (AC:L)
Privileges Required None (PR:N)
User Interaction None (UI:N)
Scope Changed (S:C)
Confidentiality Low (C:L)
Integrity Low (I:L)
Availability Low (A:L)

How to Fix CVE-2026-28476

To remediate this vulnerability, upgrade all affected Openclaw dependencies to a patched release. Both direct and transitive dependencies should be checked, as frameworks or security libraries may pull in vulnerable versions transitively.

openclaw fixed: 2026.2.14 
npm install openclaw@2026.2.14
Verify Direct and Transitive Dependencies

Run the following command in your project directory to verify that all resolved dependencies use the patched release: 

npm ls openclaw

How to Check if You Are Affected

To determine whether your Node.js application is affected by CVE-2026-28476, inspect your project dependencies using npm:

npm ls openclaw

Analyze the terminal output to locate any version of Openclaw in your dependency tree. If any resolved version matches the vulnerable ranges listed in the table below (for example, versions earlier than 2026.2.14), your application is affected.

Note: The npm ls openclaw command inspects dependencies declared in your package.json and lockfile; it does not perform automated runtime dynamic scanning.

Technical Details

Vulnerability Mechanism & Technical Analysis

This vulnerability is classified under CWE-918: Server-Side Request Forgery (SSRF), where the web server receives a url or similar request from an upstream component and retrieves the contents of this url, but it does not sufficiently ensure that the request is being sent to the expected destination. In Openclaw, software state validation or input boundaries are circumvented during processing. Review the official source advisory statement below for specific affected components, classes, and reproduction details.

Source Advisory Statement

## 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 `openclaw@2026.2.14` is published to npm, publish this advisory without further edits. Thanks @p80n-sec for reporting.

CVE-2026-28476 Affected Openclaw Versions

1 component(s)
Fixed Versions:
2026.2.14
Product / Package Ecosystem Affected Versions Fixed Version
openclaw
npm/openclaw
npm
< 2026.2.14
2026.2.14

References

GitHub Advisory / Wiki ADVISORY
https://github.com/openclaw/openclaw/security/advisories/GHSA-pg2v-8xwh-qhcc
NVD — CVE-2026-28476 NVD
https://nvd.nist.gov/vuln/detail/CVE-2026-28476
Security Fix Commit FIX COMMIT
https://github.com/openclaw/openclaw/commit/bfa7d21e997baa8e3437657d59b1e296815cc1b1
Openclaw Source Repository REPOSITORY
https://github.com/openclaw/openclaw
Openclaw Release RELEASE
https://github.com/openclaw/openclaw/releases/tag/v2026.2.14
www.vulncheck.com/advisories/openclaw... WEB
https://www.vulncheck.com/advisories/openclaw-server-side-request-forgery-in-tlon-extension-authentication

Frequently Asked Questions

What is CVE-2026-28476?
CVE-2026-28476 is a security vulnerability in Openclaw involving OpenClaw affected by SSRF in optional Tlon (Urbit) extension authentication under CWE-918: Server-Side Request Forgery (SSRF).
Which Openclaw versions are affected?
Affected versions include releases prior to 2026.2.14 across affected packages: openclaw.
What version fixes CVE-2026-28476?
Upgrading to 2026.2.14 (or the latest patched release for your respective branch) resolves the vulnerability.
Is openclaw affected?
Yes, openclaw is affected in releases prior to 2026.2.14. Upgrade your dependency to 2026.2.14 or later.
What is the CVSS score of CVE-2026-28476?
CVE-2026-28476 has a CVSS v3.1 base score of 8.3 (MODERATE) with vector string CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L.
What CWE is associated with CVE-2026-28476?
CVE-2026-28476 is classified under CWE-918: Server-Side Request Forgery (SSRF) (The web server receives a URL or similar request from an upstream component and retrieves the contents of this URL, but it does not sufficiently ensure that the request is being sent to the expected destination.).
How can I check npm dependencies for CVE-2026-28476?
Run the dependency tree command: 'npm ls openclaw'. This command lists direct and transitive dependencies in your build configuration so you can verify if a vulnerable version is resolved.
Machine-readable OSV JSON OSV v1.5 Schema
Normalized schema output
View Raw JSON 
{
  "schema_version" : "1.4.0",
  "id" : "GHSA-pg2v-8xwh-qhcc",
  "modified" : "2026-04-27T16:46:07Z",
  "published" : "2026-02-18T00:55:00Z",
  "aliases" : [ "CVE-2026-28476" ],
  "summary" : "OpenClaw affected by SSRF in optional Tlon (Urbit) extension authentication",
  "details" : "## Summary\nThe 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.\n\n## Impact\nThis 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).\n\nDeployments that do not use the Tlon extension, or where untrusted users cannot change the Urbit URL, are not impacted.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Affected versions: `<= 2026.2.13`\n\n## Fixed Versions\n- `2026.2.14` (planned next release)\n\n## Fix Commit(s)\n- `bfa7d21e997baa8e3437657d59b1e296815cc1b1`\n\n## Details\nUrbit 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`).\n\n## Release Process Note\nThis advisory is pre-populated with the planned patched version (`2026.2.14`). After `openclaw@2026.2.14` is published to npm, publish this advisory without further edits.\n\nThanks @p80n-sec for reporting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:C/C:L/I:L/A:L"
  }, {
    "type" : "CVSS_V4",
    "score" : "CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:N/VI:L/VA:N/SC:L/SI:L/SA:L"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.2.14"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-pg2v-8xwh-qhcc"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-28476"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/bfa7d21e997baa8e3437657d59b1e296815cc1b1"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/releases/tag/v2026.2.14"
  }, {
    "type" : "WEB",
    "url" : "https://www.vulncheck.com/advisories/openclaw-server-side-request-forgery-in-tlon-extension-authentication"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-918" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-18T00:55:00Z",
    "nvd_published_at" : "2026-03-05T22:16:21Z"
  }
}