Deserialization of Untrusted Data in c3p0 - CVE-2026-27830

Vulnerability identifier: #VU126753

CSH Severity: Medium

CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-27830

CWE-ID: CWE-502

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to unsafe deserialization in the userOverridesAsString property of c3p0 ConnectionPoolDataSource implementations when processing maliciously crafted Java-serialized objects or javax.naming.Reference instances. A remote user can reset this property or supply crafted serialized objects or references to execute arbitrary code.

The impact can be amplified when embedded JNDI references trigger dereferencing of a remote factoryClassLocation.

c3p0
Crucible Server
Crucible Data Center
Crowd Data Center
IBM Qradar SIEM
Oracle Business Intelligence Enterprise Edition
MongoDB Enterprise Advanced with IBM
webMethods BPM
openSUSE Leap
openEuler
mchange-commons-javadoc
mchange-commons
c3p0
c3p0-help
c3p0-javadoc
release-notes-susemanager-proxy
release-notes-susemanager
Red Hat Camel for Spring Boot

Install updates from vendor's website.

c3p0 - update to 0.12.0
Crucible Server - update to 4.9.9
Crucible Data Center - update to 4.9.9
Crowd Data Center - update to 7.2.1
IBM Qradar SIEM - update to 7.5.0 Update Pack 15 IF05
MongoDB Enterprise Advanced with IBM - update to 8.0.22
webMethods BPM - update to 11.1 Fix 6
mchange-commons-javadoc - update to 0.2.20-150400.3.3.1
mchange-commons - update to 0.2.20-150400.3.3.1
c3p0 - update to 0.9.5.4-4
c3p0-help - update to 0.9.5.4-4
c3p0 - update to 0.9.5.5-150400.3.5.1
c3p0-javadoc - update to 0.9.5.5-150400.3.5.1
release-notes-susemanager-proxy - update to 4.3.17-150400.3.107.1
release-notes-susemanager - update to 4.3.17-150400.3.151.1
Red Hat Camel for Spring Boot - update to 4.14.4

• https://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv

• Multiple vulnerabilities in Oracle Business Intelligence Enterprise Edition
• openEuler update for c3p0
• SUSE update for c3p0 and mchange-commons
• SUSE update for Maintenance update for Multi-Linux Manager 4.3 Release Notes Release Notes
• Remote code execution in c3p0
• IBM webMethods BPM update for c3p0
• Multiple vulnerabilities in Crucible Data Center and Crucible Server
• MongoDB Enterprise Advanced with IBM Ops-Manager update for c3p0
• Deserialization of Untrusted Data in Crowd Data Center
• Multiple vulnerabilities in IBM QRadar SIEM
• Multiple vulnerabilities in Red Hat Camel for Spring Boot 4.14