CVE-2026-27830
- Source
- https://cve.org/CVERecord?id=CVE-2026-27830
- Import Source
- https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27830.json
- JSON Data
- https://api.osv.dev/v1/vulns/CVE-2026-27830
- Aliases
- Downstream
- Related
- Published
- 2026-02-26T00:45:18.222Z
- Modified
- 2026-03-02T02:47:37.066909Z
- Severity
-
- 8.9 (High) CVSS_V4 - CVSS:4.0/AV:A/AC:L/AT:P/PR:L/UI:N/VC:H/VI:H/VA:H/SC:H/SI:H/SA:H CVSS Calculator
- Summary
- c3p0 vulnerable to Remote Code Execution via unsafe deserialization of userOverridesAsString property
- Details
-
c3p0, a JDBC Connection pooling library, is vulnerable to attack via maliciously crafted Java-serialized objects and
javax.naming.Referenceinstances. Several c3p0ConnectionPoolDataSourceimplementations have a property calleduserOverridesAsStringwhich conceptually represents aMap<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 existingConnectionPoolDataSourceor via maliciously crafted serialized objects orjavax.naming.Referenceinstances could be tailored execute unexpected code on the application'sCLASSPATH. The danger of this vulnerability was strongly magnified by vulnerabilities in c3p0's main dependency, mchange-commons-java. This library includes code that mirrors early implementations of JNDI functionality, including ungated support for remotefactoryClassLocationvalues. Attackers could set c3p0'suserOverridesAsStringhex-encoded serialized objects that include objects "indirectly serialized" via JNDI references. Deserialization of those objects and dereferencing of the embeddedjavax.naming.Referenceobjects could provoke download and execution of malicious code from a remotefactoryClassLocation. Although hazard presented by c3p0's 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. TheuserOverridesAsStringproperty of c3p0ConnectionPoolDataSourceclasses has been reimplemented to use a safe CSV-based format, rather than rely upon potentially dangerous Java object deserialization. c3p0-0.12.0+ and above depend upon mchange-commons-java 0.4.0+, which gates support for remotefactoryClassLocationvalues by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-javacom.mchange.v2.naming.nameGuardClassNameto prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0. - Database specific
{ "cna_assigner": "GitHub_M", "cwe_ids": [ "CWE-502", "CWE-94" ], "osv_generated_from": "https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27830.json" }- References
-
- https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/27xxx/CVE-2026-27830.json
- https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e
- https://github.com/swaldman/c3p0/security/advisories/GHSA-5476-xc4j-rqcv
- https://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal
- https://nvd.nist.gov/vuln/detail/CVE-2026-27830
- https://www.mchange.com/projects/c3p0/#configuring_security
- https://www.mchange.com/projects/c3p0/#security-note
Affected packages
Git / github.com/swaldman/c3p0
Affected ranges
- Type
- GIT
- Repo
- https://github.com/swaldman/c3p0
- Events
-
Introduced0 Unknown introduced commit / All previous commits are affectedFixed
Affected versions
c3p0-0.*
v.*
v0.*
Database specific
vanir_signatures
[
{
"digest": {
"threshold": 0.9,
"line_hashes": [
"46824971697180593737240729786572527179",
"84917938462351941215007108162592736920",
"278419095215848493408883360988075852298",
"94692633492603722811606048968335538570",
"200550371306730764186078526829842173691",
"7749586803992805010832637948946649410",
"17850762204666123273630593130137919879",
"285872969137921636428128875861199627870",
"252524300110691329966837498706784977118",
"111561662289205351157549281049990319662",
"89145210007818813345586598344203046560",
"69075301954057162582053710233828917621"
]
},
"source": "https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e",
"deprecated": false,
"id": "CVE-2026-27830-2b957ba1",
"signature_type": "Line",
"target": {
"file": "src/com/mchange/v2/c3p0/impl/C3P0ImplUtils.java"
},
"signature_version": "v1"
},
{
"digest": {
"threshold": 0.9,
"line_hashes": [
"74695028763630652077967895816390164614",
"92700908198037795230535847570077537855",
"283505094047280908804324254149306610648",
"266372632963058788873698840418794393439",
"74326980668942670843980915248320472890",
"257379428824732539344984393876989225611",
"286012511775640618088767025789365639371",
"39423627743991401242946819646215245725"
]
},
"source": "https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e",
"deprecated": false,
"id": "CVE-2026-27830-8369e7f4",
"signature_type": "Line",
"target": {
"file": "src/com/mchange/v2/c3p0/cfg/C3P0Config.java"
},
"signature_version": "v1"
},
{
"digest": {
"length": 360.0,
"function_hash": "173903484010803552804296269258915876757"
},
"source": "https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e",
"deprecated": false,
"id": "CVE-2026-27830-c06279a7",
"signature_type": "Function",
"target": {
"function": "parseUserOverridesAsString",
"file": "src/com/mchange/v2/c3p0/impl/C3P0ImplUtils.java"
},
"signature_version": "v1"
},
{
"digest": {
"length": 181.0,
"function_hash": "290240367688680601225330880448027105762"
},
"source": "https://github.com/swaldman/c3p0/commit/e14cbd8166e423e2e9a9d6f08b2add3433492d6e",
"deprecated": false,
"id": "CVE-2026-27830-fc8ab4cc",
"signature_type": "Function",
"target": {
"function": "getUserOverridesAsString",
"file": "src/com/mchange/v2/c3p0/cfg/C3P0Config.java"
},
"signature_version": "v1"
}
]
source
"https://storage.googleapis.com/cve-osv-conversion/osv-output/CVE-2026-27830.json"