CVE-2026-27830 (GCVE-0-2026-27830)

Vulnerability from cvelistv5 – Published: 2026-02-26 00:45 – Updated: 2026-06-30 12:08
VLAI
Title
c3p0 vulnerable to Remote Code Execution via unsafe deserialization of userOverridesAsString property
Summary
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<String,Map<String,String>>`. 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's `CLASSPATH`. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's 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's `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's 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.
Severity
8.9 (High)
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
8 (High)
CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H
SSVC
Exploitation: none Automatable: no Technical Impact: total
CISA Coordinator (v2.0.3)
CWE
  • CWE-502 - Deserialization of Untrusted Data
  • CWE-94 - Improper Control of Generation of Code ('Code Injection')
Assigner
References
Impacted products
Vendor Product Version
swaldman c3p0 Affected: < 0.12.0
Create a notification for this product.
Red Hat Red Hat JBoss EAP 8.1 for RHEL 8     cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8
 Create a notification for this product.
Red Hat Red Hat JBoss EAP 8.1 for RHEL 9     cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
 Create a notification for this product.
Red Hat Red Hat Satellite 6.18 for RHEL 9     cpe:/a:redhat:satellite:6.18::el9
    cpe:/a:redhat:satellite_capsule:6.18::el9
    cpe:/a:redhat:satellite_maintenance:6.18::el9
    cpe:/a:redhat:satellite_utils:6.18::el9
 Create a notification for this product.
Red Hat Red Hat Build of Debezium 3.2     cpe:/a:redhat:debezium:3
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8.1     cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9
 Create a notification for this product.
Red Hat Red Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11     cpe:/a:redhat:apache_camel_spring_boot:4.14
 Create a notification for this product.
Red Hat Red Hat build of Debezium 2     cpe:/a:redhat:debezium:2
 Create a notification for this product.
Red Hat Red Hat build of Debezium 3     cpe:/a:redhat:debezium:3
 Create a notification for this product.
Red Hat Red Hat Fuse 7     cpe:/a:redhat:jboss_fuse:7
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 7     cpe:/a:redhat:jboss_enterprise_application_platform:7
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform 8     cpe:/a:redhat:jboss_enterprise_application_platform:8
 Create a notification for this product.
Red Hat Red Hat Satellite 6     cpe:/a:redhat:satellite:6
 Create a notification for this product.
Red Hat streams for Apache Kafka 2     cpe:/a:redhat:amq_streams:2
 Create a notification for this product.
Red Hat Red Hat build of Apache Camel - HawtIO 4     cpe:/a:redhat:apache_camel_hawtio:4
 Create a notification for this product.
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack     cpe:/a:redhat:jbosseapxp
 Create a notification for this product.
Red Hat Red Hat Process Automation 7     cpe:/a:redhat:jboss_enterprise_bpms_platform:7
 Create a notification for this product.
Red Hat streams for Apache Kafka 3     cpe:/a:redhat:amq_streams:3
 Create a notification for this product.
Show details on NVD website
To clipboard 

{
  "containers": {
    "adp": [
      {
        "metrics": [
          {
            "other": {
              "content": {
                "id": "CVE-2026-27830",
                "options": [
                  {
                    "Exploitation": "none"
                  },
                  {
                    "Automatable": "no"
                  },
                  {
                    "Technical Impact": "total"
                  }
                ],
                "role": "CISA Coordinator",
                "timestamp": "2026-05-02T03:55:34.556407Z",
                "version": "2.0.3"
              },
              "type": "ssvc"
            }
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-05-04T19:40:49.642Z",
          "orgId": "134c704f-9b21-4f2e-91b3-4a467353bcc0",
          "shortName": "CISA-ADP"
        },
        "title": "CISA ADP Vulnrichment"
      },
      {
        "affected": [
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat JBoss EAP 8.1 for RHEL 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat JBoss EAP 8.1 for RHEL 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:satellite:6.18::el9",
              "cpe:/a:redhat:satellite_capsule:6.18::el9",
              "cpe:/a:redhat:satellite_maintenance:6.18::el9",
              "cpe:/a:redhat:satellite_utils:6.18::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Satellite 6.18 for RHEL 9",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:debezium:3"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Build of Debezium 3.2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat JBoss Enterprise Application Platform 8.1",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:apache_camel_spring_boot:4.14"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:debezium:2"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat build of Debezium 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:debezium:3"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat build of Debezium 3",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_fuse:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Fuse 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_application_platform:7"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat JBoss Enterprise Application Platform 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_application_platform:8"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat JBoss Enterprise Application Platform 8",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:satellite:6"
            ],
            "defaultStatus": "affected",
            "product": "Red Hat Satellite 6",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:amq_streams:2"
            ],
            "defaultStatus": "affected",
            "product": "streams for Apache Kafka 2",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:apache_camel_hawtio:4"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat build of Apache Camel - HawtIO 4",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jbosseapxp"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat JBoss Enterprise Application Platform Expansion Pack",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:jboss_enterprise_bpms_platform:7"
            ],
            "defaultStatus": "unaffected",
            "product": "Red Hat Process Automation 7",
            "vendor": "Red Hat"
          },
          {
            "cpes": [
              "cpe:/a:redhat:amq_streams:3"
            ],
            "defaultStatus": "unaffected",
            "product": "streams for Apache Kafka 3",
            "vendor": "Red Hat"
          }
        ],
        "datePublic": "2026-02-26T00:45:18.222Z",
        "descriptions": [
          {
            "lang": "en",
            "value": "A flaw was found in c3p0, a Java Database Connectivity (JDBC) Connection pooling library. This vulnerability allows an attacker to achieve arbitrary code execution by providing maliciously crafted Java-serialized objects or `javax.naming.Reference` instances. By manipulating the `userOverridesAsString` property, an attacker can cause the application to download and execute malicious code from a remote location on its CLASSPATH."
          }
        ],
        "metrics": [
          {
            "other": {
              "content": {
                "namespace": "https://access.redhat.com/security/updates/classification/",
                "value": "Important"
              },
              "type": "Red Hat severity rating"
            }
          },
          {
            "cvssV3_1": {
              "attackComplexity": "LOW",
              "attackVector": "ADJACENT_NETWORK",
              "availabilityImpact": "HIGH",
              "baseScore": 8,
              "baseSeverity": "HIGH",
              "confidentialityImpact": "HIGH",
              "integrityImpact": "HIGH",
              "privilegesRequired": "LOW",
              "scope": "UNCHANGED",
              "userInteraction": "NONE",
              "vectorString": "CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H",
              "version": "3.1"
            },
            "format": "CVSS"
          }
        ],
        "problemTypes": [
          {
            "descriptions": [
              {
                "cweId": "CWE-502",
                "description": "Deserialization of Untrusted Data",
                "lang": "en",
                "type": "CWE"
              }
            ]
          }
        ],
        "providerMetadata": {
          "dateUpdated": "2026-06-30T12:08:05.254Z",
          "orgId": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c",
          "shortName": "redhat-SADP"
        },
        "references": [
          {
            "tags": [
              "vdb-entry",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/security/cve/CVE-2026-27830"
          },
          {
            "name": "RHBZ#2442908",
            "tags": [
              "issue-tracking",
              "x_refsource_REDHAT"
            ],
            "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442908"
          },
          {
            "tags": [
              "x_sadp-csaf-vex"
            ],
            "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27830.json"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:18054"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:18055"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:28385"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:4285"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:18059"
          },
          {
            "tags": [
              "vendor-advisory",
              "x_refsource_REDHAT"
            ],
            "url": "https://access.redhat.com/errata/RHSA-2026:3890"
          }
        ],
        "solutions": [
          {
            "lang": "en",
            "value": "RHSA-2026:18054: Red Hat JBoss EAP 8.1 for RHEL 8"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:18055: Red Hat JBoss EAP 8.1 for RHEL 9"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:28385: Red Hat Satellite 6.18 for RHEL 9"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:4285: Red Hat Build of Debezium 3.2"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:18059: Red Hat JBoss Enterprise Application Platform 8.1"
          },
          {
            "lang": "en",
            "value": "RHSA-2026:3890: Red Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11"
          }
        ],
        "timeline": [
          {
            "lang": "en",
            "time": "2026-02-26T01:01:56.834Z",
            "value": "Reported to Red Hat."
          },
          {
            "lang": "en",
            "time": "2026-02-26T00:45:18.222Z",
            "value": "Made public."
          }
        ],
        "title": "c3p0: c3p0: Arbitrary Code Execution via deserialization of crafted objects",
        "x_adpType": "supplier",
        "x_generator": {
          "engine": "sadp-cli 1.0.0"
        }
      }
    ],
    "cna": {
      "affected": [
        {
          "product": "c3p0",
          "vendor": "swaldman",
          "versions": [
            {
              "status": "affected",
              "version": "\u003c 0.12.0"
            }
          ]
        }
      ],
      "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."
        }
      ],
      "metrics": [
        {
          "cvssV4_0": {
            "attackComplexity": "LOW",
            "attackRequirements": "PRESENT",
            "attackVector": "ADJACENT",
            "baseScore": 8.9,
            "baseSeverity": "HIGH",
            "privilegesRequired": "LOW",
            "subAvailabilityImpact": "HIGH",
            "subConfidentialityImpact": "HIGH",
            "subIntegrityImpact": "HIGH",
            "userInteraction": "NONE",
            "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",
            "version": "4.0",
            "vulnAvailabilityImpact": "HIGH",
            "vulnConfidentialityImpact": "HIGH",
            "vulnIntegrityImpact": "HIGH"
          }
        }
      ],
      "problemTypes": [
        {
          "descriptions": [
            {
              "cweId": "CWE-502",
              "description": "CWE-502: Deserialization of Untrusted Data",
              "lang": "en",
              "type": "CWE"
            }
          ]
        },
        {
          "descriptions": [
            {
              "cweId": "CWE-94",
              "description": "CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)",
              "lang": "en",
              "type": "CWE"
            }
          ]
        }
      ],
      "providerMetadata": {
        "dateUpdated": "2026-02-26T00:45:18.222Z",
        "orgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
        "shortName": "GitHub_M"
      },
      "references": [
        {
          "name": "https://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv",
          "tags": [
            "x_refsource_CONFIRM"
          ],
          "url": "https://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv"
        },
        {
          "name": "https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e"
        },
        {
          "name": "https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal"
        },
        {
          "name": "https://www.mchange.com/projects/c3p0/#configuring_security",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.mchange.com/projects/c3p0/#configuring_security"
        },
        {
          "name": "https://www.mchange.com/projects/c3p0/#security-note",
          "tags": [
            "x_refsource_MISC"
          ],
          "url": "https://www.mchange.com/projects/c3p0/#security-note"
        }
      ],
      "source": {
        "advisory": "GHSA-5476-xc4j-rqcv",
        "discovery": "UNKNOWN"
      },
      "title": "c3p0 vulnerable to Remote Code Execution via unsafe deserialization of userOverridesAsString property"
    }
  },
  "cveMetadata": {
    "assignerOrgId": "a0819718-46f1-4df5-94e2-005712e83aaa",
    "assignerShortName": "GitHub_M",
    "cveId": "CVE-2026-27830",
    "datePublished": "2026-02-26T00:45:18.222Z",
    "dateReserved": "2026-02-24T02:32:39.800Z",
    "dateUpdated": "2026-06-30T12:08:05.254Z",
    "state": "PUBLISHED"
  },
  "dataType": "CVE_RECORD",
  "dataVersion": "5.2",
  "vulnerability-lookup:meta": {
    "epss": {
      "cve": "CVE-2026-27830",
      "date": "2026-07-06",
      "epss": "0.00534",
      "percentile": "0.41193"
    },
    "nvd": "{\"cve\":{\"id\":\"CVE-2026-27830\",\"sourceIdentifier\":\"security-advisories@github.com\",\"published\":\"2026-02-26T01:16:24.583\",\"lastModified\":\"2026-06-30T03:17:57.933\",\"vulnStatus\":\"Deferred\",\"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.\"}],\"affected\":[{\"source\":\"security-advisories@github.com\",\"affectedData\":[{\"vendor\":\"swaldman\",\"product\":\"c3p0\",\"versions\":[{\"version\":\"\u003c 0.12.0\",\"status\":\"affected\"}]}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"affectedData\":[{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss EAP 8.1 for RHEL 8\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss EAP 8.1 for RHEL 9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Satellite 6.18 for RHEL 9\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:satellite:6.18::el9\",\"cpe:/a:redhat:satellite_capsule:6.18::el9\",\"cpe:/a:redhat:satellite_maintenance:6.18::el9\",\"cpe:/a:redhat:satellite_utils:6.18::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Build of Debezium 3.2\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:debezium:3\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform 8.1\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_application_platform:8.1::el9\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat build of Apache Camel 4.14.4 for Spring Boot 3.5.11\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:apache_camel_spring_boot:4.14\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat build of Debezium 2\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:debezium:2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat build of Debezium 3\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:debezium:3\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Fuse 7\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:jboss_fuse:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform 7\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_application_platform:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform 8\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_application_platform:8\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Satellite 6\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:satellite:6\"]},{\"vendor\":\"Red Hat\",\"product\":\"streams for Apache Kafka 2\",\"defaultStatus\":\"affected\",\"cpes\":[\"cpe:/a:redhat:amq_streams:2\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat build of Apache Camel - HawtIO 4\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:apache_camel_hawtio:4\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat JBoss Enterprise Application Platform Expansion Pack\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jbosseapxp\"]},{\"vendor\":\"Red Hat\",\"product\":\"Red Hat Process Automation 7\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:jboss_enterprise_bpms_platform:7\"]},{\"vendor\":\"Red Hat\",\"product\":\"streams for Apache Kafka 3\",\"defaultStatus\":\"unaffected\",\"cpes\":[\"cpe:/a:redhat:amq_streams:3\"]}]}],\"metrics\":{\"cvssMetricV40\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"4.0\",\"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\",\"baseScore\":8.9,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT\",\"attackComplexity\":\"LOW\",\"attackRequirements\":\"PRESENT\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"vulnConfidentialityImpact\":\"HIGH\",\"vulnIntegrityImpact\":\"HIGH\",\"vulnAvailabilityImpact\":\"HIGH\",\"subConfidentialityImpact\":\"HIGH\",\"subIntegrityImpact\":\"HIGH\",\"subAvailabilityImpact\":\"HIGH\",\"exploitMaturity\":\"NOT_DEFINED\",\"confidentialityRequirement\":\"NOT_DEFINED\",\"integrityRequirement\":\"NOT_DEFINED\",\"availabilityRequirement\":\"NOT_DEFINED\",\"modifiedAttackVector\":\"NOT_DEFINED\",\"modifiedAttackComplexity\":\"NOT_DEFINED\",\"modifiedAttackRequirements\":\"NOT_DEFINED\",\"modifiedPrivilegesRequired\":\"NOT_DEFINED\",\"modifiedUserInteraction\":\"NOT_DEFINED\",\"modifiedVulnConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedVulnIntegrityImpact\":\"NOT_DEFINED\",\"modifiedVulnAvailabilityImpact\":\"NOT_DEFINED\",\"modifiedSubConfidentialityImpact\":\"NOT_DEFINED\",\"modifiedSubIntegrityImpact\":\"NOT_DEFINED\",\"modifiedSubAvailabilityImpact\":\"NOT_DEFINED\",\"Safety\":\"NOT_DEFINED\",\"Automatable\":\"NOT_DEFINED\",\"Recovery\":\"NOT_DEFINED\",\"valueDensity\":\"NOT_DEFINED\",\"vulnerabilityResponseEffort\":\"NOT_DEFINED\",\"providerUrgency\":\"NOT_DEFINED\"}}],\"cvssMetricV31\":[{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"cvssData\":{\"version\":\"3.1\",\"vectorString\":\"CVSS:3.1/AV:A/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H\",\"baseScore\":8.0,\"baseSeverity\":\"HIGH\",\"attackVector\":\"ADJACENT_NETWORK\",\"attackComplexity\":\"LOW\",\"privilegesRequired\":\"LOW\",\"userInteraction\":\"NONE\",\"scope\":\"UNCHANGED\",\"confidentialityImpact\":\"HIGH\",\"integrityImpact\":\"HIGH\",\"availabilityImpact\":\"HIGH\"},\"exploitabilityScore\":2.1,\"impactScore\":5.9}],\"ssvcV203\":[{\"source\":\"134c704f-9b21-4f2e-91b3-4a467353bcc0\",\"ssvcData\":{\"timestamp\":\"2026-05-02T03:55:34.556407Z\",\"id\":\"CVE-2026-27830\",\"options\":[{\"exploitation\":\"none\"},{\"automatable\":\"no\"},{\"technicalImpact\":\"total\"}],\"role\":\"CISA Coordinator\",\"version\":\"2.0.3\"}}]},\"weaknesses\":[{\"source\":\"security-advisories@github.com\",\"type\":\"Primary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-94\"},{\"lang\":\"en\",\"value\":\"CWE-502\"}]},{\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\",\"type\":\"Secondary\",\"description\":[{\"lang\":\"en\",\"value\":\"CWE-502\"}]}],\"references\":[{\"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\",\"source\":\"security-advisories@github.com\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:18054\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:18055\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:18059\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:28385\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:3890\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/errata/RHSA-2026:4285\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://access.redhat.com/security/cve/CVE-2026-27830\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://bugzilla.redhat.com/show_bug.cgi?id=2442908\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"},{\"url\":\"https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27830.json\",\"source\":\"0b0ca135-0b70-47e7-9f44-1890c2a1c46c\"}]}}",
    "vulnrichment": {
      "containers": "{\"adp\": [{\"title\": \"CISA ADP Vulnrichment\", \"metrics\": [{\"other\": {\"type\": \"ssvc\", \"content\": {\"id\": \"CVE-2026-27830\", \"role\": \"CISA Coordinator\", \"options\": [{\"Exploitation\": \"none\"}, {\"Automatable\": \"no\"}, {\"Technical Impact\": \"total\"}], \"version\": \"2.0.3\", \"timestamp\": \"2026-05-02T03:55:34.556407Z\"}}}], \"providerMetadata\": {\"orgId\": \"134c704f-9b21-4f2e-91b3-4a467353bcc0\", \"shortName\": \"CISA-ADP\", \"dateUpdated\": \"2026-02-27T16:25:47.891Z\"}}], \"cna\": {\"title\": \"c3p0 vulnerable to Remote Code Execution via unsafe deserialization of userOverridesAsString property\", \"source\": {\"advisory\": \"GHSA-5476-xc4j-rqcv\", \"discovery\": \"UNKNOWN\"}, \"metrics\": [{\"cvssV4_0\": {\"version\": \"4.0\", \"baseScore\": 8.9, \"attackVector\": \"ADJACENT\", \"baseSeverity\": \"HIGH\", \"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\", \"userInteraction\": \"NONE\", \"attackComplexity\": \"LOW\", \"attackRequirements\": \"PRESENT\", \"privilegesRequired\": \"LOW\", \"subIntegrityImpact\": \"HIGH\", \"vulnIntegrityImpact\": \"HIGH\", \"subAvailabilityImpact\": \"HIGH\", \"vulnAvailabilityImpact\": \"HIGH\", \"subConfidentialityImpact\": \"HIGH\", \"vulnConfidentialityImpact\": \"HIGH\"}}], \"affected\": [{\"vendor\": \"swaldman\", \"product\": \"c3p0\", \"versions\": [{\"status\": \"affected\", \"version\": \"\u003c 0.12.0\"}]}], \"references\": [{\"url\": \"https://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv\", \"name\": \"https://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv\", \"tags\": [\"x_refsource_CONFIRM\"]}, {\"url\": \"https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e\", \"name\": \"https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal\", \"name\": \"https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://www.mchange.com/projects/c3p0/#configuring_security\", \"name\": \"https://www.mchange.com/projects/c3p0/#configuring_security\", \"tags\": [\"x_refsource_MISC\"]}, {\"url\": \"https://www.mchange.com/projects/c3p0/#security-note\", \"name\": \"https://www.mchange.com/projects/c3p0/#security-note\", \"tags\": [\"x_refsource_MISC\"]}], \"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.\"}], \"problemTypes\": [{\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-502\", \"description\": \"CWE-502: Deserialization of Untrusted Data\"}]}, {\"descriptions\": [{\"lang\": \"en\", \"type\": \"CWE\", \"cweId\": \"CWE-94\", \"description\": \"CWE-94: Improper Control of Generation of Code (\u0027Code Injection\u0027)\"}]}], \"providerMetadata\": {\"orgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"shortName\": \"GitHub_M\", \"dateUpdated\": \"2026-02-26T00:45:18.222Z\"}}}",
      "cveMetadata": "{\"cveId\": \"CVE-2026-27830\", \"state\": \"PUBLISHED\", \"dateUpdated\": \"2026-05-04T19:40:49.642Z\", \"dateReserved\": \"2026-02-24T02:32:39.800Z\", \"assignerOrgId\": \"a0819718-46f1-4df5-94e2-005712e83aaa\", \"datePublished\": \"2026-02-26T00:45:18.222Z\", \"assignerShortName\": \"GitHub_M\"}",
      "dataType": "CVE_RECORD",
      "dataVersion": "5.2"
    }
  }
}


Log in or create an account to share your comment.




Tags
Taxonomy of the tags.





Forecast uses a logistic model when the trend is rising, or an exponential decay model when the trend is falling. Fitted via linearized least squares.

Sightings

Author Source Type Date Other

Nomenclature

  • Seen: The vulnerability was mentioned, discussed, or observed by the user.
  • Confirmed: The vulnerability has been validated from an analyst's perspective.
  • Published Proof of Concept: A public proof of concept is available for this vulnerability.
  • Exploited: The vulnerability was observed as exploited by the user who reported the sighting.
  • Patched: The vulnerability was observed as successfully patched by the user who reported the sighting.
  • Not exploited: The vulnerability was not observed as exploited by the user who reported the sighting.
  • Not confirmed: The user expressed doubt about the validity of the vulnerability.
  • Not patched: The vulnerability was not observed as successfully patched by the user who reported the sighting.


Detection rules are retrieved from Rulezet.