CVE-2026-27009: Openclaw Cross-Site Scripting Vulnerability

{
  "schema_version" : "1.4.0",
  "id" : "GHSA-37gc-85xm-2ww6",
  "modified" : "2026-02-20T16:47:40Z",
  "published" : "2026-02-18T22:44:33Z",
  "aliases" : [ "CVE-2026-27009" ],
  "summary" : "OpenClaw affected by Stored XSS in Control UI via unsanitized assistant name/avatar in inline script injection",
  "details" : "## Summary\nStored XSS in the OpenClaw Control UI when rendering assistant identity (name/avatar) into an inline `<script>` tag without script-context-safe escaping. A crafted value containing `</script>` could break out of the script tag and execute attacker-controlled JavaScript in the Control UI origin.\n\n## Affected Packages / Versions\n- Package: `openclaw` (npm)\n- Affected versions: `<= 2026.2.14`\n- Fixed in: `>= 2026.2.15` (next release; fix is already merged on `main`)\n\n## Details\nThe gateway Control UI HTML response previously injected `assistantName` and `assistantAvatar` directly into an inline `<script>` block using `JSON.stringify(...)`. `JSON.stringify` does not prevent `</script>` from terminating the script element, enabling stored XSS if an operator/admin sets the assistant identity to a malicious string.\n\nOpenClaw’s Control UI is intended for local use only (see `SECURITY.md`); this advisory’s CVSS reflects a loopback-only/local-access deployment assumption.\n\n## Impact\nAn attacker with the ability to set assistant identity values (config or agent identity) could cause JavaScript execution for Control UI visitors, enabling token/session theft and privileged actions in the UI.\n\n## Fix\n- Removed inline script injection and serve bootstrap config from a JSON endpoint.\n- Added a restrictive Content Security Policy for the Control UI (`script-src 'self'`, no inline scripts).\n\n## Fix Commit(s)\n- `adc818db4a4b3b8d663e7674ef20436947514e1b`\n- `3b4096e02e7e335f99f5986ec1bd566e90b14a7e`\n\n## Release Process Note\nThis advisory pre-sets the patched version to the planned next release (`2026.2.15`). Once that version is published to npm, this advisory can be published without further edits.\n\nThanks @Adam55A-code for reporting.",
  "severity" : [ {
    "type" : "CVSS_V3",
    "score" : "CVSS:3.1/AV:L/AC:L/PR:H/UI:R/S:U/C:H/I:H/A:N"
  } ],
  "affected" : [ {
    "package" : {
      "ecosystem" : "npm",
      "name" : "openclaw"
    },
    "ranges" : [ {
      "type" : "ECOSYSTEM",
      "events" : [ {
        "introduced" : "0"
      }, {
        "fixed" : "2026.2.15"
      } ]
    } ]
  } ],
  "references" : [ {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/security/advisories/GHSA-37gc-85xm-2ww6"
  }, {
    "type" : "ADVISORY",
    "url" : "https://nvd.nist.gov/vuln/detail/CVE-2026-27009"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/3b4096e02e7e335f99f5986ec1bd566e90b14a7e"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/commit/adc818db4a4b3b8d663e7674ef20436947514e1b"
  }, {
    "type" : "PACKAGE",
    "url" : "https://github.com/openclaw/openclaw"
  }, {
    "type" : "WEB",
    "url" : "https://github.com/openclaw/openclaw/releases/tag/v2026.2.15"
  } ],
  "database_specific" : {
    "cwe_ids" : [ "CWE-79" ],
    "severity" : "MODERATE",
    "github_reviewed" : true,
    "github_reviewed_at" : "2026-02-18T22:44:33Z",
    "nvd_published_at" : "2026-02-20T00:16:17Z"
  }
}