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CVE-2022-23516

Estado: ModificadaAlta (7.5)—

Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.2.0, < 2.19.1 uses recursion for sanitizing CDATA sections, making it susceptible to stack exhaustion and raising a SystemStackError exception. This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1. Users who are unable to upgrade may be able to mitigate this vulnerability by limiting the length of the strings that are sanitized.

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).

Tecnologías afectadas (1)

Loofah Project — Loofah

CWE

Referencias

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{
  "id": "CVE-2022-23516",
  "cveTags": [],
  "metrics": {
    "ssvcV203": [
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        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "id": "CVE-2022-23516",
          "role": "CISA Coordinator",
          "options": [
            {
              "exploitation": "none"
            },
            {
              "automatable": "yes"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "version": "2.0.3",
          "timestamp": "2025-04-18T18:19:29.547979Z"
        }
      }
    ],
    "cvssMetricV31": [
      {
        "type": "Secondary",
        "source": "security-advisories@github.com",
        "cvssData": {
          "scope": "UNCHANGED",
          "version": "3.1",
          "baseScore": 7.5,
          "attackVector": "NETWORK",
          "baseSeverity": "HIGH",
          "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
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      {
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          "integrityImpact": "NONE",
          "userInteraction": "NONE",
          "attackComplexity": "LOW",
          "availabilityImpact": "HIGH",
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  "published": "2022-12-14T14:15:10.627",
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      "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-3x8r-x6xp-q4vm",
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      "url": "https://lists.debian.org/debian-lts-announce/2023/09/msg00011.html",
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      "url": "https://github.com/flavorjones/loofah/security/advisories/GHSA-3x8r-x6xp-q4vm",
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  ],
  "vulnStatus": "Modified",
  "weaknesses": [
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      "description": [
        {
          "lang": "en",
          "value": "CWE-674"
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  ],
  "descriptions": [
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      "lang": "en",
      "value": "Loofah is a general library for manipulating and transforming HTML/XML documents and fragments, built on top of Nokogiri. Loofah >= 2.2.0, < 2.19.1 uses recursion for sanitizing CDATA sections, making it susceptible to stack exhaustion and raising a SystemStackError exception.  This may lead to a denial of service through CPU resource consumption. This issue is patched in version 2.19.1. Users who are unable to upgrade may be able to mitigate this vulnerability by limiting the length of the strings that are sanitized."
    },
    {
      "lang": "es",
      "value": "Loofah es una librería general para manipular y transformar documentos y fragmentos HTML/XML, construida sobre Nokogiri. Loofah versiones &gt;= 2.2.0 y &lt; 2.19.1 usa recursividad para sanitizar secciones CDATA, lo que la hace susceptible al agotamiento de la pila de memoria y genera una excepción SystemStackError. Esto puede provocar una denegación de servicio debido al consumo de recursos de la CPU. Este problema se solucionó en la versión 2.19.1. Los usuarios que no puedan actualizar pueden mitigar esta vulnerabilidad limitando la longitud de las cadenas que se sanitizan."
    }
  ],
  "lastModified": "2026-06-17T04:30:16.837",
  "configurations": [
    {
      "nodes": [
        {
          "negate": false,
          "cpeMatch": [
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          "operator": "OR"
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