{
  "cveId": "CVE-2026-27830",
  "url": "https://patchblox.com/security/cve/CVE-2026-27830",
  "summary": "CVE-2026-27830 is fixed in 3 products on 1 platform, first by SUSE-SU-2026:0855-1, released March 10, 2026. It is not reported as exploited. Patch Radar priority: Routine.",
  "title": "libc3p0-java: c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and...",
  "description": "c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and \u0060javax.naming.Reference\u0060 instances. Several c3p0 \u0060ConnectionPoolDataSource\u0060 implementations have a property called \u0060userOverridesAsString\u0060 which conceptually represents a \u0060Map\u0026lt;String,Map\u0026lt;String,String\u0026gt;\u0026gt;\u0060. 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 \u0060ConnectionPoolDataSource\u0060 or via maliciously crafted serialized objects or \u0060javax.naming.Reference\u0060 instances could be tailored execute unexpected code on the application\u0027s \u0060CLASSPATH\u0060. 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 \u0060factoryClassLocation\u0060 values. Attackers could set c3p0\u0027s \u0060userOverridesAsString\u0060 hex-encoded serialized objects that include objects \u0022indirectly serialized\u0022 via JNDI references. Deserialization of those objects and dereferencing of the embedded \u0060javax.naming.Reference\u0060 objects could provoke download and execution of malicious code from a remote \u0060factoryClassLocation\u0060. 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 \u0060userOverridesAsString\u0060 property of c3p0 \u0060ConnectionPoolDataSource\u0060 classes has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0\u002B and above depend upon mchange-commons-java 0.4.0\u002B, which gates support for remote \u0060factoryClassLocation\u0060 values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java \u0060com.mchange.v2.naming.nameGuardClassName\u0060 to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0.",
  "published": "2026-02-25T17:16:00Z",
  "severity": "Medium",
  "epss": 0.00595,
  "epssPercentile": 0.48728,
  "priority": "Routine",
  "priorityTier": 4,
  "exploited": false,
  "vendorExploited": false,
  "disclosed": false,
  "fixes": [
    {
      "platform": "linux",
      "product": "c3p0",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "0.9.5.5-150400.3.5.1",
      "fix": "SUSE-SU-2026:0855-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0855-1",
      "released": "2026-03-10T05:06:36Z"
    },
    {
      "platform": "linux",
      "product": "libc3p0-java",
      "release": "Ubuntu 18.04.6 LTS (bionic)",
      "fixedVersion": "0.9.1.2-9\u002Bdeb8u1ubuntu0.18.04.1\u002Besm1",
      "fix": "libc3p0-java 0.9.1.2-9\u002Bdeb8u1ubuntu0.18.04.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-bionic-libc3p0-java-0.9.1.2-9-deb8u1ubuntu0.18.04.1-esm1",
      "released": "2026-07-01T14:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libc3p0-java",
      "release": "Ubuntu 20.04 LTS (focal)",
      "fixedVersion": "0.9.1.2-10ubuntu0.20.04.1\u002Besm1",
      "fix": "libc3p0-java 0.9.1.2-10ubuntu0.20.04.1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-focal-libc3p0-java-0.9.1.2-10ubuntu0.20.04.1-esm1",
      "released": "2026-07-01T14:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libc3p0-java",
      "release": "Ubuntu 22.04.1 LTS (jammy)",
      "fixedVersion": "0.9.1.2-10ubuntu1\u002Besm1",
      "fix": "libc3p0-java 0.9.1.2-10ubuntu1\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-jammy-libc3p0-java-0.9.1.2-10ubuntu1-esm1",
      "released": "2026-07-01T14:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libc3p0-java",
      "release": "Ubuntu 24.04.5 LTS (noble)",
      "fixedVersion": "0.9.1.2-10ubuntu2\u002Besm1",
      "fix": "libc3p0-java 0.9.1.2-10ubuntu2\u002Besm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-noble-libc3p0-java-0.9.1.2-10ubuntu2-esm1",
      "released": "2026-07-01T14:17:00Z"
    },
    {
      "platform": "linux",
      "product": "libc3p0-java",
      "release": "Ubuntu 26.04.1 LTS (resolute)",
      "fixedVersion": "0.9.1.2-11ubuntu0.1~esm1",
      "fix": "libc3p0-java 0.9.1.2-11ubuntu0.1~esm1",
      "url": "https://patchblox.com/security/fix/linux/ubuntu-resolute-libc3p0-java-0.9.1.2-11ubuntu0.1-esm1",
      "released": "2026-07-01T14:17:00Z"
    },
    {
      "platform": "linux",
      "product": "mchange-commons",
      "release": "opensuse-leap 15.6",
      "fixedVersion": "0.2.20-150400.3.3.1",
      "fix": "SUSE-SU-2026:0855-1",
      "url": "https://patchblox.com/security/fix/linux/suse-su-2026-0855-1",
      "released": "2026-03-10T05:06:36Z"
    }
  ],
  "noFixYet": [],
  "dataAsOf": "2026-11-09T01:18:40Z",
  "attribution": {
    "text": "Data: Patchblox Patch Radar",
    "url": "https://patchblox.com/security/patch-radar",
    "terms": "https://patchblox.com/security/patch-radar/use-the-data"
  }
}