Billion laughs attack in c3p0
c3p0 version < 0.9.5.4 may be exploited by a billion laughs attack when loading XML configuration due to missing protections against recursive entity expansion when loading configuration.
Affected software
Click a technology to see all vulnerabilities affecting it.
| Platform | Package | Vulnerable versions | Fixed in |
|---|---|---|---|
| Java / Kotlin (Maven) | com.mchange:c3p0 | < 0.9.5.4 | 0.9.5.4 |
References
- https://nvd.nist.gov/vuln/detail/CVE-2019-5427
- https://hackerone.com/reports/509315
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/BFIVX6HOVNLAM7W3SUAMHYRNLCVQSAWR
- https://lists.fedoraproject.org/archives/list/package-announce@lists.fedoraproject.org/message/MQ47OFV57Y2DAHMGA5H3JOL4WHRWRFN4
- https://www.oracle.com/security-alerts/cpuapr2020.html
- https://www.oracle.com/security-alerts/cpujan2021.html
- https://www.oracle.com/security-alerts/cpujul2020.html
- https://www.oracle.com/security-alerts/cpuoct2020.html
- https://www.oracle.com/security-alerts/cpuoct2021.html
- CVSS vector
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H- Weakness (CWE)
CWE-776- Platform
- Java / Kotlin (Maven)
- Package
com.mchange:c3p0- Disclosed
- 23.04.2019
- Updated
- 11.10.2026 11:21
Sources and licenses
OSV / GitHub Advisory Database - GHSA-84p2-vf58-xhxv - CC BY 4.0
Vulnerability history: com.mchange:c3p0
All published vulnerabilities of this package (Java / Kotlin (Maven)), newest first. Shows whether this is a one-off slip or a package that needs watching.
- Total entries
- 4
- First → latest
- 01.2019 07.2026
- Without a fix
- 0
- Exploited in attacks
- 0
Severity breakdown
- Critical 1
- High 2
- Medium 1
Disclosures per year
- 2019: 2
- 2020: 0
- 2021: 0
- 2022: 0
- 2023: 0
- 2024: 0
- 2025: 0
- 2026: 2
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