CVE-2026-87830

{
  "etk_id": "ETK-2026-513",
  "cve_id": "CVE-2026-87830",
  "display_id": "CVE-2026-87830",
  "ghsa_id": "GHSA-66vg-36xv-j6x4",
  "euvd_id": "EUVD-2026-89792",
  "status": "published",
  "anchor_state": "anchored",
  "title": "WS-SecurityPolicy XPath validation bypass in Apache WSS4J",
  "summary": "Apache WSS4J's StAX streaming WS-SecurityPolicy validator can mishandle certain relative or unsupported XPath expressions. A remote SOAP peer may cause a required XML element to be accepted without the policy's expected signature or encryption when affected XPath-based policy rules are used.",
  "mitigation": "Upgrade org.apache.wss4j:wss4j-ws-security-policy-stax to 4.0.2, 3.0.6, or 2.4.4, as appropriate for your release line.",
  "vendor": "Apache Software Foundation",
  "product": "Apache WSS4J",
  "affected": [
    {
      "affected_notes": [],
      "affected_ranges": [
        ">= 4.0.0, < 4.0.2",
        ">= 3.0.0, < 3.0.6",
        ">= 0, < 2.4.4"
      ],
      "ecosystem": null,
      "fixed_versions": [
        "4.0.2",
        "3.0.6",
        "2.4.4"
      ],
      "package_name": "org.apache.wss4j:wss4j-ws-security-policy-stax",
      "purl": null
    }
  ],
  "cwes": [
    917
  ],
  "cvss_score": 9.1,
  "cvss_src": "nvd",
  "cvss_vector": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:H/I:H/A:N",
  "epss_score": 0.0021,
  "epss_percentile": 0.1095,
  "epss_asof": "2026-10-20",
  "automation": "contextual",
  "check": true,
  "check_confidence_basis": "mechanism_verified",
  "exploit": false,
  "pipeline_minutes": 20.01464145,
  "t0_at": "2026-09-30T11:57:01.017000+00:00",
  "signals": {
    "check": {
      "at": "2026-10-04T00:02:16.541414+00:00",
      "days": 3.503651902939815,
      "is_lower_bound": false,
      "measured_at": "2026-09-30T11:57:01.017000+00:00",
      "url": null
    },
    "trigger_signal": {
      "at": "2026-09-30T11:57:01.017000+00:00",
      "days": 0,
      "is_lower_bound": false,
      "measured_at": "2026-09-30T11:57:01.017000+00:00",
      "url": "https://www.cve.org/CVERecord?id=CVE-2026-87830"
    }
  }
}