CVE-2026-27727

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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. 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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."}, {"lang": "es", "value": "mchange-commons-java, una librer\u00eda que proporciona utilidades de Java, incluye c\u00f3digo que emula implementaciones tempranas de la funcionalidad JNDI, incluyendo soporte para valores remotos de `factoryClassLocation`, mediante los cuales se puede descargar e invocar c\u00f3digo dentro de una aplicaci\u00f3n en ejecuci\u00f3n. Si un atacante puede provocar que una aplicaci\u00f3n lea un `jaxax.naming.Reference` o un objeto serializado maliciosamente dise\u00f1ado, pueden provocar la descarga y ejecuci\u00f3n de c\u00f3digo malicioso. Las implementaciones de esta funcionalidad dentro del JDK fueron deshabilitadas por defecto detr\u00e1s de una propiedad de sistema que por defecto es `false`, `com.sun.jndi.ldap.object.trustURLCodebase`. Sin embargo, dado que mchange-commons-java incluye una implementaci\u00f3n independiente de la desreferenciaci\u00f3n JNDI, las librer\u00edas (como c3p0) que resuelven referencias a trav\u00e9s de esa implementaci\u00f3n podr\u00edan ser provocadas para descargar y ejecutar c\u00f3digo malicioso incluso despu\u00e9s de que el JDK fuera reforzado. Emulando el parche del JDK, la funcionalidad JNDI de mchange-commons-java est\u00e1 restringida por par\u00e1metros de configuraci\u00f3n que por defecto tienen valores restrictivos a partir de la versi\u00f3n 0.4.0. No se conocen soluciones alternativas disponibles. 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"https://access.redhat.com/errata/RHSA-2026:18054"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:18055"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:18059"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:34365"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:3890"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/errata/RHSA-2026:4285"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://access.redhat.com/security/cve/CVE-2026-27727"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442671"}, {"source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "url": "https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-27727.json"}], "sourceIdentifier": "security-advisories@github.com", "vulnStatus": "Modified", "weaknesses": [{"description": [{"lang": "en", "value": "CWE-74"}], "source": "security-advisories@github.com", "type": "Secondary"}, {"description": [{"lang": "en", "value": "CWE-502"}], "source": "0b0ca135-0b70-47e7-9f44-1890c2a1c46c", "type": "Secondary"}]}

{"bugzilla": {"description": "com.mchange/mchange-commons-java: mchange-commons-java: Arbitrary code execution via JNDI dereferencing of crafted objects", "id": "2442671", "url": "https://bugzilla.redhat.com/show_bug.cgi?id=2442671"}, "csaw": false, "cvss3": {"cvss3_base_score": "8.3", "cvss3_scoring_vector": "CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:C/C:H/I:H/A:H", "status": "draft"}, "cwe": "CWE-502", "details": ["No description is available for this CVE."], "mitigation": {"lang": "en:us", "value": "Mitigation for this issue is either not available or the currently available options do not meet the Red Hat Product Security criteria comprising ease of use and deployment, applicability to widespread installation base or stability."}, "name": "CVE-2026-27727", "package_state": [{"cpe": "cpe:/a:redhat:camel_spring_boot:4", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat build of Apache Camel for Spring Boot 4"}, {"cpe": "cpe:/a:redhat:apache_camel_hawtio:4", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat build of Apache Camel - HawtIO 4"}, {"cpe": "cpe:/a:redhat:debezium:2", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat build of Debezium 2"}, {"cpe": "cpe:/a:redhat:debezium:3", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat build of Debezium 3"}, {"cpe": "cpe:/a:redhat:jboss_fuse:7", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat Fuse 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:7", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat JBoss Enterprise Application Platform 7"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_application_platform:8", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat JBoss Enterprise Application Platform 8"}, {"cpe": "cpe:/a:redhat:jbosseapxp", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat JBoss Enterprise Application Platform Expansion Pack"}, {"cpe": "cpe:/a:redhat:jboss_enterprise_bpms_platform:7", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "Red Hat Process Automation 7"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "candlepin", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:satellite:6", "fix_state": "Affected", "package_name": "satellite:el8/candlepin", "product_name": "Red Hat Satellite 6"}, {"cpe": "cpe:/a:redhat:amq_streams:2", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "streams for Apache Kafka 2"}, {"cpe": "cpe:/a:redhat:amq_streams:3", "fix_state": "Affected", "package_name": "mchange-commons-java", "product_name": "streams for Apache Kafka 3"}], "public_date": "2026-02-25T16:01:04Z", "references": ["https://www.cve.org/CVERecord?id=CVE-2026-27727\nhttps://nvd.nist.gov/vuln/detail/CVE-2026-27727\nhttps://github.com/swaldman/mchange-commons-java/security/advisories/GHSA-m2cm-222f-qw44\nhttps://mogwailabs.de/en/blog/2025/02/c3p0-you-little-rascal\nhttps://www.mchange.com/projects/c3p0/#configuring_security\nhttps://www.mchange.com/projects/c3p0/#security-note"], "threat_severity": "Important"}

{"affected": [{"configurations": [{"platform": null, "status": "affected", "versions": {"scheme": "semver", "value": "[0,0.4.0)"}}], "enrichment": {"confidence": 100.0, "confidence_source": "cna", "scores": [{"score": 100.0, "source": "cna"}]}, "original": {"product": "mchange-commons-java", "source": "cna", "vendor": "swaldman"}, "product": "mchange-commons-java", "vendor": "swaldman"}], "analysis": {"en": {"generated_at": "2026-04-17T15:11:05.234667+00:00", "value": {"mitigation_remediation": ["Upgrade mchange-commons-java to version 0.4.0 or later and ensure its configuration defaults remain restrictive.", "Explicitly disable external JNDI reference resolution by setting the appropriate configuration property (e.g., disabling dynamic classloading or codebase URLs) in the library\u2019s settings.", "If an upgrade is not feasible, remove or isolate the library from the application\u2019s classpath to prevent accidental deserialization and JNDI processing."], "summary": {"action": "Upgrade", "impact": "Remote Code Execution"}, "threat_synthesis": {"affected_systems": "The vulnerability affects the mchange-commons-java library provided by swaldman. All releases prior to 0.4.0 are confirmed to execute remote code by default. Starting with 0.4.0 the library includes configuration guards that default to restrictive settings, but the functionality remains present and can be re-enabled by application configuration. Any system that includes mchange-commons-java on its classpath and processes untrusted serialized data or JNDI references is at risk.\n", "description_and_impact": "mchange-commons-java implements legacy JNDI handling, allowing external factory class locations to be resolved and executed by an application. If an attacker can supply a maliciously crafted Reference or serialized object, the library will download and run arbitrary code in the application's process. The flaw is rooted in unsafe deserialization and uncontrolled network-based codebase loading, represented by CWE-502 and CWE-74. This enables full compromise of the hosting system, granting the attacker any privileges the application runs with.\n", "risk_and_exploitability": "The CVSS score of 8.9 classifies this issue as High severity. The EPSS score of less than 1% indicates that, while still high impact, exploitation in the wild is currently rare or not widely observed. The vulnerability is not listed in the CISA Known Exploited Vulnerabilities catalog, reducing the urgency of the risk but not eliminating it. The attack vector is inferred as exploitation of the library\u2019s JNDI reference resolution by supplying crafted references or serialized payloads into the application. Precautions around classpath inclusion and configuration defaults mitigate the risk, but the primary mitigation is to remove or upgrade the affected library.\n"}}}}, "created": "2026-02-26T13:15:46.025158+00:00", "updated": "2026-04-17T15:15:21.856276+00:00", "vendors": ["swaldman", "swaldman$PRODUCT$mchange-commons-java"]}