# CVE-2026-55223: libc3p0-java: c3p0 is a JDBC Connection pooling library

CVE-2026-55223 is fixed in libc3p0-java on 1 platform, first by libc3p0-java 0.9.1.2-9+deb8u1ubuntu0.18.04.1+esm1, released July 1, 2026. It is not reported as exploited. Patch Radar priority: Routine.

- Web page: https://patchblox.com/security/cve/CVE-2026-55223
- Priority: Routine
- CVSS: n/a (Medium)
- EPSS: 0.0048
- CISA KEV: not listed
- Exploited (vendor report): no
- Publicly disclosed: no
- Published: Jun 30, 2026

## Description

c3p0 is a JDBC Connection pooling library. In versions prior to 0.14.0, c3p0 in combination with other libraries, can compose to a "sink" for deserialization gadgets. The JDBC spec's DataSource.getConnection() and ConnectionPoolDataSource.getPooledConnection() match the getXXX() form, so JavaBean libraries treat them as "properties" assumed safe while they actually call into JDBC drivers. Attackers can thus craft malicious DataSource objects whose property lookups invoke vulnerable drivers, then smuggle them in serialized form to where an application deserializes and auto-resolves bean properties — triggering the attack. This requires a susceptible DataSource/ConnectionPoolDataSource and JDBC driver on the CLASSPATH, plus a carrier that auto-looks-up JavaBean properties on = deserialization, most commonly a collection paired with an Apache commons-beanutils Comparator that sorts by bean properties. c3p0 supplied that susceptible DataSource/ConnectionPoolDataSource, which was an essential component of the trigger. This issue has been fixed in version 0.14.0.

## Where it's fixed

| Platform | Product | Fixed in | Fix | Released |
|---|---|---|---|---|
| Linux | libc3p0-java Ubuntu 18.04.6 LTS (bionic) | 0.9.1.2-9+deb8u1ubuntu0.18.04.1+esm1 | [libc3p0-java 0.9.1.2-9+deb8u1ubuntu0.18.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-bionic-libc3p0-java-0.9.1.2-9-deb8u1ubuntu0.18.04.1-esm1.md) | Jul 1, 2026 |
| Linux | libc3p0-java Ubuntu 20.04 LTS (focal) | 0.9.1.2-10ubuntu0.20.04.1+esm1 | [libc3p0-java 0.9.1.2-10ubuntu0.20.04.1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-focal-libc3p0-java-0.9.1.2-10ubuntu0.20.04.1-esm1.md) | Jul 1, 2026 |
| Linux | libc3p0-java Ubuntu 22.04.1 LTS (jammy) | 0.9.1.2-10ubuntu1+esm1 | [libc3p0-java 0.9.1.2-10ubuntu1+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-jammy-libc3p0-java-0.9.1.2-10ubuntu1-esm1.md) | Jul 1, 2026 |
| Linux | libc3p0-java Ubuntu 24.04.5 LTS (noble) | 0.9.1.2-10ubuntu2+esm1 | [libc3p0-java 0.9.1.2-10ubuntu2+esm1](https://patchblox.com/security/data/fix/linux/ubuntu-noble-libc3p0-java-0.9.1.2-10ubuntu2-esm1.md) | Jul 1, 2026 |
| Linux | libc3p0-java Ubuntu 26.04.1 LTS (resolute) | 0.9.1.2-11ubuntu0.1~esm1 | [libc3p0-java 0.9.1.2-11ubuntu0.1~esm1](https://patchblox.com/security/data/fix/linux/ubuntu-resolute-libc3p0-java-0.9.1.2-11ubuntu0.1-esm1.md) | Jul 1, 2026 |

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Data as of 2026-11-08T19:12:23Z UTC. Source: Patchblox Patch Radar (https://patchblox.com/security/patch-radar). Patchblox finds out-of-date software on Windows, macOS and Linux and updates it through release rings: https://patchblox.com/demo

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