CVE-2026-44242

{
  "id": "CVE-2026-44242",
  "sourceIdentifier": "[email protected]",
  "published": "2026-05-12T22:16:35.617",
  "lastModified": "2026-10-26T14:10:00.130",
  "vulnStatus": "Deferred",
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "Micronaut Framework is a JVM-based full stack Java framework designed for building modular, easily testable JVM applications. Prior to 4.10.22, the bundleCache is keyed by (Locale, baseName) where the locale originates from the HTTP Accept-Language header. In applications that explicitly register a ResourceBundleMessageSource bean and serve HTML error responses, an unauthenticated attacker can exhaust heap memory by sending requests with large numbers of unique Accept-Language values, each causing a new entry in the unbounded bundleCache. This vulnerability is fixed in 4.10.22."
    },
    {
      "lang": "es",
      "value": "Micronaut Framework es un framework Java de pila completa basado en JVM diseñado para construir aplicaciones JVM modulares y fácilmente testeables. Antes de la versión 4.10.22, el bundleCache se indexa por (Locale, baseName) donde la configuración regional se origina del encabezado HTTP Accept-Language. En aplicaciones que registran explícitamente un bean ResourceBundleMessageSource y sirven respuestas de error HTML, un atacante no autenticado puede agotar la memoria del montón enviando solicitudes con un gran número de valores únicos de Accept-Language, cada uno causando una nueva entrada en el bundleCache ilimitado. Esta vulnerabilidad está corregida en la versión 4.10.22."
    }
  ],
  "affected": [
    {
      "source": "[email protected]",
      "affectedData": [
        {
          "vendor": "micronaut-projects",
          "product": "micronaut-core",
          "versions": [
            {
              "version": "< 4.10.22",
              "status": "affected"
            }
          ]
        }
      ]
    }
  ],
  "metrics": {
    "cvssMetricV31": [
      {
        "source": "[email protected]",
        "type": "Secondary",
        "cvssData": {
          "version": "3.1",
          "vectorString": "CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:N/I:N/A:L",
          "baseScore": 3.7,
          "baseSeverity": "LOW",
          "attackVector": "NETWORK",
          "attackComplexity": "HIGH",
          "privilegesRequired": "NONE",
          "userInteraction": "NONE",
          "scope": "UNCHANGED",
          "confidentialityImpact": "NONE",
          "integrityImpact": "NONE",
          "availabilityImpact": "LOW"
        },
        "exploitabilityScore": 2.2,
        "impactScore": 1.4
      }
    ],
    "ssvcV203": [
      {
        "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
        "ssvcData": {
          "timestamp": "2026-05-13T14:54:21.098658Z",
          "id": "CVE-2026-44242",
          "options": [
            {
              "exploitation": "poc"
            },
            {
              "automatable": "no"
            },
            {
              "technicalImpact": "partial"
            }
          ],
          "role": "CISA Coordinator",
          "version": "2.0.3"
        }
      }
    ]
  },
  "weaknesses": [
    {
      "source": "[email protected]",
      "type": "Secondary",
      "description": [
        {
          "lang": "en",
          "value": "CWE-400"
        }
      ]
    }
  ],
  "references": [
    {
      "url": "https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-3rfq-4wpf-qqw3",
      "source": "[email protected]"
    },
    {
      "url": "https://github.com/micronaut-projects/micronaut-core/security/advisories/GHSA-3rfq-4wpf-qqw3",
      "source": "134c704f-9b21-4f2e-91b3-4a467353bcc0"
    }
  ]
}