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CVE-2026-91863

Estado: AnalizadaAlta (7.5)—

A specially crafted WS-Policy document with deeply nested policy elements can bypass Neethi's nesting-depth limit and exhaust the thread stack, crashing the parser (denial of service). Users are recommended to upgrade to version 3.2.4, which fixes this issue.

CVSS

Probabilidad de explotación (EPSS)

EPSS (Exploit Prediction Scoring System, de FIRST) estima la probabilidad de que una vulnerabilidad sea explotada en 30 días. Complementa a CVSS (impacto) y a CISA KEV (explotación confirmada).

🎯 Técnicas ATT&CK

Cómo se explota esta vulnerabilidad y qué consigue el atacante, en el lenguaje de MITRE ATT&CK.

Vulnerabilidad de análisis de documento WS-Policy remoto sin autenticación (AV:N, PR:N) causando agotamiento de recursos y caída del servicio. CWE-674 indica desbordamiento de pila por recursión profunda.

Inferido por nuestro agente de análisis a partir de la descripción oficial, el vector CVSS y la CWE, y comprobado por un supervisor. Puede contener errores.

🛡️ Mitigaciones ATT&CK que cubren estas técnicas

Filter Network TrafficVulnerability ScanningPrivileged Account ManagementNetwork SegmentationLimit Access to Resource Over NetworkApplication Isolation and Sandboxing

Tecnologías afectadas (1)

Apache — Neethi

CWE

Referencias

JSON original (NVD)

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{
  "id": "CVE-2026-91863",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2026-91863",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
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              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2026-09-21T13:35:51.992035Z"
        }
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          "vectorString": "CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H",
          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
          "privilegesRequired": "NONE",
          "confidentialityImpact": "NONE"
        },
        "impactScore": 3.6,
        "exploitabilityScore": 3.9
      }
    ]
  },
  "affected": [
    {
      "source": "security@apache.org",
      "affectedData": [
        {
          "vendor": "Apache Software Foundation",
          "product": "Apache Neethi",
          "versions": [
            {
              "status": "affected",
              "version": "0",
              "lessThan": "3.2.4",
              "versionType": "semver"
            }
          ],
          "packageName": "org.apache.neethi:neethi",
          "collectionURL": "https://repo.maven.apache.org/maven2",
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  "published": "2026-09-21T12:17:24.697",
  "references": [
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      "tags": [
        "Mailing List",
        "Vendor Advisory"
      ],
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  "vulnStatus": "Analyzed",
  "weaknesses": [
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      "description": [
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      "lang": "en",
      "value": "A specially crafted WS-Policy document with deeply nested policy elements can bypass Neethi's nesting-depth limit and exhaust the thread stack, crashing the parser (denial of service).\nUsers are recommended to upgrade to version 3.2.4, which fixes this issue."
    }
  ],
  "lastModified": "2026-09-24T20:34:14.977",
  "configurations": [
    {
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        {
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          "cpeMatch": [
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