{"id":"CVE-2026-42527","aliases":["GHSA-8h6p-jvhf-9hcr"],"url":"https://o3.security/vulnerability/CVE-2026-42527","summary":"Apache Camel: Permissive default ObjectInputFilter pattern admits java.net.** and enables DNS-based information disclosure","details":"Deserialization of Untrusted Data vulnerability in Apache Camel.\n\nThe default ObjectInputFilter pattern shipped with several Apache Camel components for defense-in-depth deserialization filtering ('java.**;javax.**;org.apache.camel.**;!*', or the no-'javax.**' variant in the aggregation-repository components) uses a recursive 'java.**' glob that admits classes whose hashCode/equals/readObject methods perform network I/O, notably java.net.URL and java.net.InetAddress. When an attacker can deliver a Java-serialized payload to an affected Camel consumer, deserialization of a HashMap (or any collection that calls hashCode on its elements) containing java.net.URL keys causes the JVM to issue DNS queries to the attacker-supplied host during the deserialization side-effect. The class-level filter check passes because the resulting object's class (HashMap) is allow-listed; the DNS query is observable on an attacker-controlled DNS server, providing an out-of-band side channel. The exposure is highest on the camel-jms family because JmsBinding.extractBodyFromJms invokes ObjectMessage.getObject() unconditionally when mapJmsMessage=true (default). Affected components: camel-jms, camel-sjms, camel-amqp, camel-mina, camel-netty, camel-netty-http, camel-vertx-http, camel-infinispan, and the aggregation repository components camel-leveldb, camel-cassandraql, camel-consul, camel-sql (JDBC aggregation repository).\nThis issue affects Apache Camel: from 4.14.0 before 4.14.8, from 4.15.0 before 4.18.3, from 4.19.0 before 4.21.0.\n\nUsers are recommended to upgrade to a version that contains the CAMEL-23372 fix once available: 4.21.0 for the 4.21.x line, 4.18.3 for the 4.18.x line, and 4.14.8 for the 4.14.x line. For deployments that cannot upgrade immediately, configure a JMS-provider-side allow-list (Apache ActiveMQ Artemis 'deserializationAllowList' / 'deserializationDenyList', Apache ActiveMQ Classic 'org.apache.activemq.SERIALIZABLE_PACKAGES') as the primary mitigation, and/or override the in-code default via the endpoint-level 'deserializationFilter' option or the JVM-wide '-Djdk.serialFilter' system property with an explicit deny: '!java.net.**;java.**;javax.**;org.apache.camel.**;!*' (or '!java.net.**;java.**;org.apache.camel.**;!*' for the aggregation-repository components, which do not include javax.**).","published":"2026-07-06T07:55:06.159Z","modified":"2026-08-26T15:26:24.953884703Z","cvss":{"score":8.1,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:H/PR:N/UI:N/S:U/C:H/I:H/A:H"},"epss":{"score":0.00668,"percentile":0.49283,"asOf":"2026-08-27"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.apache.camel:camel-jms","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-jms","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-jms","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-sjms","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-sjms","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-sjms","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-amqp","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-amqp","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-amqp","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-mina","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-mina","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-mina","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-netty","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-netty","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-netty","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-netty-http","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-netty-http","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-netty-http","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-vertx-http","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-vertx-http","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-vertx-http","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-infinispan","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-infinispan","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-infinispan","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-leveldb","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-leveldb","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-leveldb","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-cassandraql","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-cassandraql","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-cassandraql","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-consul","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-consul","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-consul","fixedVersion":"4.21.0"},{"ecosystem":"Maven","name":"org.apache.camel:camel-sql","fixedVersion":"4.14.8"},{"ecosystem":"Maven","name":"org.apache.camel:camel-sql","fixedVersion":"4.18.3"},{"ecosystem":"Maven","name":"org.apache.camel:camel-sql","fixedVersion":"4.21.0"}],"fix":null,"references":[{"type":"WEB","url":"http://www.openwall.com/lists/oss-security/2026/07/05/4"},{"type":"WEB","url":"https://repo.maven.apache.org/maven2"},{"type":"ADVISORY","url":"https://camel.apache.org/security/CVE-2026-42527.html"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2026/42xxx/CVE-2026-42527.json"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2026-42527"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-26T15:26:24.953884703Z"}}