{
  "cveId": "CVE-2026-54163",
  "url": "https://patchblox.com/security/cve/CVE-2026-54163",
  "summary": "CVE-2026-54163 is fixed in ruby-secure-headers on 1 platform by DEBIAN-CVE-2026-54163 (version 7.3.0-1), released July 19, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "ruby-secure-headers: secure_headers manages application of security headers with many safe defaults",
  "description": "secure_headers manages application of security headers with many safe defaults. Prior to 7.3.0, secure_headers builds the Content-Security-Policy value by stitching directives with ; separators, and build_sandbox_list_directive, build_media_type_list_directive, and build_report_to_directive interpolate caller-supplied strings without scrubbing ;, \\r, or \\n. When untrusted input reaches SecureHeaders.override_content_security_policy_directives or append APIs for :sandbox, :plugin_types, or :report_to, an attacker can inject a CSP directive such as script-src \u0027unsafe-inline\u0027 * before the legitimate script-src, enabling XSS reachability through these sinks or CSP report exfiltration. This issue is fixed in version 7.3.0.",
  "published": "2026-07-17T21:17:08Z",
  "severity": "medium",
  "cvss": 4.7,
  "cvssVector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:L/I:L/A:N",
  "epss": 0.00214,
  "epssPercentile": 0.11778,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "ruby-secure-headers",
      "release": "Debian 14",
      "fixedVersion": "7.3.0-1",
      "fix": "DEBIAN-CVE-2026-54163",
      "url": "https://patchblox.com/security/fix/linux/debian-cve-2026-54163",
      "released": "2026-07-19T12:50:38Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T13:31:49Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}