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c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and `javax.naming.Reference` instances. Several c3p0 `ConnectionPoolDataSource` implem…

High CVSS 8.0
CVECVE-2026-27830
First seen2026-08-05 23:15 UTC
Disclosed2026-02-26 01:16 UTC
Last updated2026-08-05 23:15 UTC
Channel statusauto

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 mal…

In-depth triage · Auto channel

No in-depth report has been generated yet (DR-003 v2 AI pipeline is under construction).

Lint boundary warnings (3)

The following non-blocking warnings were raised during the lint phase of this triage (e.g. reference URLs not yet on the allowlist). They do not affect entry usability and are disclosed for transparency (see DR-002).

  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://www.mchange.com/projects/c3p0/#configuring_security
  • REF_URL_NOT_ALLOWLISTED url not in allowlist: https://www.mchange.com/projects/c3p0/#security-note

Sources

  • NVD DATABASE

Original Links

Timeline

  1. nvd_ingest NVD