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 maliciously crafted serialized objects or `javax.naming.Reference` instances could be tailored execute unexpected code on the application's `CLASSPATH`. 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 remote `factoryClassLocation` values. Attackers could set c3p0's `userOverridesAsString` hex-encoded serialized objects that include objects "indirectly serialized" via JNDI references. Deserialization of those objects and dereferencing of the embedded `javax.naming.Reference` objects could provoke download and execution of malicious code from a remote `factoryClassLocation`. 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. The `userOverridesAsString` property of c3p0 `ConnectionPoolDataSource` classes 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 remote `factoryClassLocation` values by configuration parameters that default to restrictive values. c3p0 additionally enforces the new mchange-commons-java `com.mchange.v2.naming.nameGuardClassName` to prevent injection of unexpected, potentially remote JNDI names. There is no supported workaround for versions of c3p0 prior to 0.12.0.

oracle CPUApr2026: Business Intelligence Enterprise Edition

The version of Oracle Business Intelligence Enterprise Edition (OAS) 7.6.0.0.0 installed on the remote host is affected by multiple vulnerabilities as referenced in the April 2026 CPU advisory.

  - mchange-commons-java, a library that provides Java utilities, includes code that mirrors early     implementations of JNDI functionality, including support for remote `factoryClassLocation` values, by     which code can be downloaded and invoked within a running application. If an attacker can provoke an     application to read a maliciously crafted `jaxax.naming.Reference` or serialized object, they can provoke     the download and execution of malicious code. Implementations of this functionality within the JDK were     disabled by default behind a System property that defaults to `false`,     `com.sun.jndi.ldap.object.trustURLCodebase`. However, since mchange-commons-java includes an independent     implementation of JNDI derefencing, libraries (such as c3p0) that resolve references via that     implementation could be provoked to download and execute malicious code even after the JDK was hardened.
    Mirroring the JDK patch, mchange-commons-java's JNDI functionality is gated by configuration parameters     that default to restrictive values starting in version 0.4.0. No known workarounds are available. Versions     prior to 0.4.0 should be avoided on application CLASSPATHs. (CVE-2026-27727)

  - Eclipse Jersey 2.28 to 2.33 and Eclipse Jersey 3.0.0 to 3.0.1 contains a local information disclosure     vulnerability. This is due to the use of the File.createTempFile which creates a file inside of the system     temporary directory with the permissions: -rw-r--r--. Thus the contents of this file are viewable by all     other users locally on the system. As such, if the contents written is security sensitive, it can be     disclosed to other local users. (CVE-2021-28168)

  - In Connect2id Nimbus JOSE+JWT before 9.37.2, an attacker can cause a denial of service (resource     consumption) via a large JWE p2c header value (aka iteration count) for the PasswordBasedDecrypter     (PBKDF2) component. (CVE-2023-52428)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The version of Oracle Business Intelligence Enterprise Edition (OAS) 8.2.0.0.0 installed on the remote host is affected by multiple vulnerabilities as referenced in the April 2026 CPU advisory.

  - Vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Analytics     (component: Platform Security (Eclipse Jersey)). Supported versions that are affected are 7.6.0.0.0 and     8.2.0.0.0. Easily exploitable vulnerability allows low privileged attacker with logon to the     infrastructure where Oracle Business Intelligence Enterprise Edition executes to compromise Oracle     Business Intelligence Enterprise Edition. Successful attacks of this vulnerability can result in     unauthorized access to critical data or complete access to all Oracle Business Intelligence Enterprise     Edition accessible data. (CVE-2021-28168)

  - Vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Analytics     (component: Platform Security (Mchange Commons Java)). Supported versions that are affected are 7.6.0.0.0     and 8.2.0.0.0. Easily exploitable vulnerability allows unauthenticated attacker with network access via     LDAP to compromise Oracle Business Intelligence Enterprise Edition. Successful attacks of this     vulnerability can result in takeover of Oracle Business Intelligence Enterprise Edition. (CVE-2026-27727)

  - Vulnerability in the Oracle Business Intelligence Enterprise Edition product of Oracle Analytics     (component: BI Platform Security (OpenSSL)). The supported version that is affected is 8.2.0.0.0. Easily     exploitable vulnerability allows unauthenticated attacker with network access via TLS to compromise Oracle     Business Intelligence Enterprise Edition. Successful attacks require human interaction from a person other     than the attacker. Successful attacks of this vulnerability can result in takeover of Oracle Business     Intelligence Enterprise Edition. (CVE-2025-15467)

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The remote openSUSE 15 host has packages installed that are affected by multiple vulnerabilities as referenced in the SUSE-SU-2026:0855-1 advisory.

    c3p0:

    - Security issues fixed:

      - CVE-2026-27830: Fixed unsafe object deserialization (bsc#1258942)

    - Fix the null pointer exception in the userOverridesAsString       method (bsc#1259313).

    mchange-commons:

    - Security issues fixed:

      - CVE-2026-27727: Disabled remote ClassLoading when dereferencing javax.naming.Reference instances     (bsc#1258913)

Tenable has extracted the preceding description block directly from the SUSE security advisory.

Note that Nessus has not tested for these issues but has instead relied only on the application's self-reported version number.

The Linux/Unix host has one or more packages installed that are impacted by a vulnerability without a vendor supplied patch available.

  - c3p0 vulnerable to Remote Code Execution via unsafe deserialization of userOverridesAsString property     (CVE-2026-27830)

Note that Nessus relies on the presence of the package as reported by the vendor.

ID	Name	Product	Family	Severity
309965	Oracle Business Intelligence Enterprise Edition (OAS 7.6) (April 2026 CPU)	Nessus	Misc.	high
309964	Oracle Business Intelligence Enterprise Edition (OAS 8.2) (April 2026 CPU)	Nessus	Misc.	high
301811	openSUSE 15 Security Update : c3p0 and mchange-commons (SUSE-SU-2026:0855-1)	Nessus	SuSE Local Security Checks	high
300173	Linux Distros Unpatched Vulnerability : CVE-2026-27830	Nessus	Misc.	high

Detections

Analytics

CVE-2026-27830

high

Tenable Plugins

Coming Soon

high

high

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high