{
  "cveTags": [],
  "descriptions": [
    {
      "lang": "en",
      "value": "c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implementations have a property called `userOverridesAsString` which conceptually represents a `Map\u003cString,Map\u003cString,String\u003e\u003e`. Prior to v0.12.0, that property was maintained as a hex-encoded serialized object. Any attacker able to reset this property, on an existing `ConnectionPoolDataSource` or via maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application\u0027s `CLASSPATH`. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0\u0027s main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remote `factoryClassLocation` values. Attackers could set c3p0\u0027s `userOverridesAsString` hex-encoded serialized objects that include objects \"indirectly serialized\" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`. Although hazard presented by c3p0\u0027s vulnerabilites are exarcerbated by vulnerabilities in mchange-commons-java, use of Java-serialized-object hex as the format for a writable Java-Bean property, of objects that may be exposed across JNDI interfaces, represents a serious independent fragility. The `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remote `factoryClassLocation` values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0."
    },
    {
      "lang": "es",
      "value": "c3p0, una biblioteca de pooling de conexiones JDBC, es vulnerable al ataque a trav\u00e9s de objetos serializados en Java creados maliciosamente e instancias de `javax.naming.Reference`. Varias implementaciones de `ConnectionPoolDataSource` de c3p0 tienen una propiedad llamada `userOverridesAsString` que representa conceptualmente un `Map\u0026gt;`. Antes de la v0.12.0, esa propiedad se manten\u00eda como un objeto serializado codificado en hexadecimal. Cualquier atacante capaz de restablecer esta propiedad, en un `ConnectionPoolDataSource` existente o a trav\u00e9s de objetos serializados creados maliciosamente o instancias de `javax.naming.Reference`, podr\u00eda ser manipulado para ejecutar c\u00f3digo inesperado en el `CLASSPATH` de la aplicaci\u00f3n. El peligro de esta vulnerabilidad fue fuertemente magnificado por vulnerabilidades en la dependencia principal de c3p0, mchange-commons-java. Esta biblioteca incluye c\u00f3digo que refleja implementaciones tempranas de la funcionalidad JNDI, incluyendo soporte sin restricciones para valores remotos de `factoryClassLocation`. Los atacantes podr\u00edan establecer objetos serializados codificados en hexadecimal de `userOverridesAsString` de c3p0 que incluyen objetos \u0027serializados indirectamente\u0027 a trav\u00e9s de referencias JNDI. La deserializaci\u00f3n de esos objetos y la desreferenciaci\u00f3n de los objetos `javax.naming.Reference` incrustados podr\u00edan provocar la descarga y ejecuci\u00f3n de c\u00f3digo malicioso desde un `factoryClassLocation` remoto. Aunque el peligro presentado por las vulnerabilidades de c3p0 se ve exacerbado por las vulnerabilidades en mchange-commons-java, el uso de hexadecimal de objetos serializados en Java como formato para una propiedad Java-Bean escribible, de objetos que pueden ser expuestos a trav\u00e9s de interfaces JNDI, representa una grave fragilidad independiente. La propiedad `userOverridesAsString` de las clases `ConnectionPoolDataSource` de c3p0 ha sido reimplementada para usar un formato seguro basado en CSV, en lugar de depender de la deserializaci\u00f3n de objetos Java potencialmente peligrosa. c3p0-0.12.0+ y versiones superiores dependen de mchange-commons-java 0.4.0+, que restringe el soporte para valores remotos de `factoryClassLocation` mediante par\u00e1metros de configuraci\u00f3n que por defecto son valores restrictivos. c3p0 adicionalmente impone el nuevo `com.mchange.v2.naming.nameGuardClassName` de mchange-commons-java para prevenir la inyecci\u00f3n de nombres JNDI inesperados, potencialmente remotos. No hay soluci\u00f3n alternativa soportada para versiones de c3p0 anteriores a la 0.12.0."
    }
  ],
  "id": "CVE-2026-27830",
  "lastModified": "2026-04-15T00:35:42.020",
  "metrics": {
    "cvssMetricV40": [
      {
        "cvssData": {
          "Automatable": "NOT_DEFINED",
          "Recovery": "NOT_DEFINED",
          "Safety": "NOT_DEFINED",
          "attackComplexity": "LOW",
          "attackRequirements": "PRESENT",
          "attackVector": "ADJACENT",
          "availabilityRequirement": "NOT_DEFINED",
          "baseScore": 8.9,
          "baseSeverity": "HIGH",
          "confidentialityRequirement": "NOT_DEFINED",
          "exploitMaturity": "NOT_DEFINED",
          "integrityRequirement": "NOT_DEFINED",
          "modifiedAttackComplexity": "NOT_DEFINED",
          "modifiedAttackRequirements": "NOT_DEFINED",
          "modifiedAttackVector": "NOT_DEFINED",
          "modifiedPrivilegesRequired": "NOT_DEFINED",
          "modifiedSubAvailabilityImpact": "NOT_DEFINED",
          "modifiedSubConfidentialityImpact": "NOT_DEFINED",
          "modifiedSubIntegrityImpact": "NOT_DEFINED",
          "modifiedUserInteraction": "NOT_DEFINED",
          "modifiedVulnAvailabilityImpact": "NOT_DEFINED",
          "modifiedVulnConfidentialityImpact": "NOT_DEFINED",
          "modifiedVulnIntegrityImpact": "NOT_DEFINED",
          "privilegesRequired": "LOW",
          "providerUrgency": "NOT_DEFINED",
          "subAvailabilityImpact": "HIGH",
          "subConfidentialityImpact": "HIGH",
          "subIntegrityImpact": "HIGH",
          "userInteraction": "NONE",
          "valueDensity": "NOT_DEFINED",
          "vectorString": "CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X",
          "version": "4.0",
          "vulnAvailabilityImpact": "HIGH",
          "vulnConfidentialityImpact": "HIGH",
          "vulnIntegrityImpact": "HIGH",
          "vulnerabilityResponseEffort": "NOT_DEFINED"
        },
        "source": "security-advisories@github.com",
        "type": "Secondary"
      }
    ]
  },
  "published": "2026-02-26T01:16:24.583",
  "references": [
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://www.mchange.com/projects/c3p0/#configuring_security"
    },
    {
      "source": "security-advisories@github.com",
      "url": "https://www.mchange.com/projects/c3p0/#security-note"
    }
  ],
  "sourceIdentifier": "security-advisories@github.com",
  "vulnStatus": "Deferred",
  "weaknesses": [
    {
      "description": [
        {
          "lang": "en",
          "value": "CWE-94"
        },
        {
          "lang": "en",
          "value": "CWE-502"
        }
      ],
      "source": "security-advisories@github.com",
      "type": "Primary"
    }
  ]
}