{"affected":[{"database_specific":{"source":"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-5m9f-rphj-c435/GHSA-5m9f-rphj-c435.json"},"package":{"ecosystem":"Maven","name":"com.rabbitmq:amqp-client","purl":"pkg:maven/com.rabbitmq/amqp-client"},"ranges":[{"events":[{"introduced":"0"},{"fixed":"5.33.0"}],"type":"ECOSYSTEM"}],"versions":["1.3.0","1.5.4","1.5.5","1.6.0","1.7.2","1.8.0","1.8.1","2.0.0","2.1.0","2.1.1","2.2.0","2.3.0","2.3.1","2.4.1","2.5.0","2.5.1","2.6.0","2.6.1","2.7.0","2.7.1","2.8.0","2.8.1","2.8.2","2.8.3","2.8.4","2.8.5","2.8.6","2.8.7","3.0.0","3.0.1","3.0.2","3.0.3","3.0.4","3.1.0","3.1.1","3.1.2","3.1.3","3.1.4","3.2.0","3.2.1","3.2.2","3.2.3","3.2.4","3.3.0","3.3.1","3.3.2","3.3.3","3.3.4","3.3.5","3.4.0","3.4.1","3.4.2","3.4.3","3.4.4","3.5.0","3.5.1","3.5.2","3.5.3","3.5.4","3.5.5","3.5.6","3.5.7","3.6.0","3.6.1","3.6.2","3.6.3","3.6.4","3.6.5","3.6.6","4.0.0","4.0.1","4.0.2","4.0.3","4.1.0","4.1.1","4.10.0","4.11.0","4.11.1","4.11.2","4.11.3","4.12.0","4.2.0","4.2.1","4.2.2","4.3.0","4.4.0","4.4.1","4.4.2","4.5.0","4.6.0","4.7.0","4.8.0","4.8.1","4.8.2","4.8.3","4.9.0","4.9.1","4.9.2","4.9.3","5.0.0","5.1.0","5.1.1","5.1.2","5.10.0","5.11.0","5.12.0","5.13.0","5.13.1","5.14.0","5.14.1","5.14.2","5.14.3","5.15.0","5.16.0","5.16.1","5.17.0","5.17.1","5.18.0","5.19.0","5.2.0","5.20.0","5.21.0","5.22.0","5.23.0","5.24.0","5.25.0","5.26.0","5.27.0","5.27.1","5.28.0","5.29.0","5.3.0","5.30.0","5.31.0","5.32.0","5.4.0","5.4.1","5.4.2","5.4.3","5.5.0","5.5.1","5.5.2","5.5.3","5.6.0","5.7.0","5.7.1","5.7.2","5.7.3","5.8.0","5.9.0"]}],"aliases":["CVE-2026-63336"],"database_specific":{"cwe_ids":["CWE-295"],"github_reviewed":true,"github_reviewed_at":"2026-08-18T16:32:59Z","nvd_published_at":null,"severity":"MODERATE"},"details":"## Vulnerability Summary\n\n`com.rabbitmq.client.TrustEverythingTrustManager` accepts ANY TLS certificate (including null chains) and is used as the default trust manager when calling `ConnectionFactory.useSslProtocol()` without arguments. Combined with hostname verification being disabled by default, this enables trivial man-in-the-middle attacks.\n\n## Affected Components\n\n- `com.rabbitmq.client.TrustEverythingTrustManager` — accepts any certificate\n- `com.rabbitmq.client.ConnectionFactory.useSslProtocol()` — uses TrustEverythingTrustManager\n- Hostname verification disabled by default (`enableHostnameVerification()` must be called explicitly)\n- `com.rabbitmq.client.ConnectionFactory.getPassword()` — returns plaintext with no redaction\n- Default port 5672 (plaintext) with PLAIN SASL — credentials sent unencrypted\n\n## POC (Verified on Java 21, amqp-client 5.25.0)\n\n```java\n// TrustEverythingTrustManager accepts ANY certificate including null\nTrustEverythingTrustManager tm = new TrustEverythingTrustManager();\ntm.checkServerTrusted(null, \"RSA\");  // No exception — accepts null cert chain\ntm.getAcceptedIssuers();  // Returns empty array — trusts all CAs\n\n// ConnectionFactory defaults\nConnectionFactory factory = new ConnectionFactory();\nfactory.useSslProtocol();  // Uses TrustEverythingTrustManager internally\n// enableHostnameVerification() NOT called by default\n\n// Credential exposure\nfactory.setPassword(\"secret_password_123\");\nfactory.getPassword();  // Returns \"secret_password_123\" — no redaction\n\n// Default plaintext port\nfactory.getPort();  // 5672 (plaintext, not 5671/TLS)\n\n// PLAIN SASL sends cleartext credentials\nPlainMechanism pm = new PlainMechanism();\n// handleChallenge() sends username+password in cleartext\n```\n\n## Attack Scenarios\n\n1. **MITM**: Attacker presents self-signed cert → `TrustEverythingTrustManager` accepts it → all RabbitMQ traffic intercepted\n2. **Credential theft**: Default plaintext port (5672) + PLAIN SASL = credentials readable on network\n3. **DNS rebinding**: No hostname verification → attacker DNS record → MITM without cert\n4. **Logging exposure**: `getPassword()` returns plaintext → credentials in logs/stack traces\n\n## Suggested Fix\n1. Deprecate `TrustEverythingTrustManager` — it should never be used in production\n2. `useSslProtocol()` should use the JVM default trust store, not TrustEverything\n3. Enable hostname verification by default\n4. Redact password in `getPassword()` or remove the public getter\n5. Warn when using PLAIN SASL without TLS","id":"GHSA-5m9f-rphj-c435","modified":"2026-09-10T03:51:13.150501327Z","published":"2026-08-18T16:32:59Z","references":[{"type":"WEB","url":"https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-5m9f-rphj-c435"},{"type":"WEB","url":"https://github.com/rabbitmq/rabbitmq-java-client/pull/1999"},{"type":"WEB","url":"https://github.com/rabbitmq/rabbitmq-java-client/pull/2001"},{"type":"WEB","url":"https://github.com/rabbitmq/rabbitmq-java-client/commit/1e7deb2e6020c9793a81385a53ea378ec63b9339"},{"type":"WEB","url":"https://github.com/rabbitmq/rabbitmq-java-client/commit/a4bf571dd368765baaa9cecfae68ce09f1bdcc01"},{"type":"PACKAGE","url":"https://github.com/rabbitmq/rabbitmq-java-client"},{"type":"WEB","url":"https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.0"}],"schema_version":"1.9.0","severity":[{"score":"CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:N/SC:H/SI:L/SA:N","type":"CVSS_V4"}],"summary":"RabbitMQ Java client: TrustEverythingTrustManager used by default in useSslProtocol() enables MITM"}