SB2026070938 - Multiple vulnerabilities in RabbitMQ Java Client Library
Published: July 9, 2026
Breakdown by Severity
- Low
- Medium
- High
- Critical
Description
This security bulletin contains information about 5 vulnerabilities.
1) Unsafe reflection (CVE-ID: N/A)
CWE-ID: CWE-470 - Use of Externally-Controlled Input to Select Classes or Code ('Unsafe Reflection')
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:H/VA:H/SC:N/SI:N/SA:N/E:U/U:Amber
The vulnerability allows a remote attacker to execute arbitrary code.
The vulnerability exists due to use of externally-controlled input to select classes or code in ProcedureDescription in com.rabbitmq.tools.jsonrpc when processing a crafted JSON-RPC service description from untrusted AMQP messages. A remote attacker can send a crafted system.describe response with attacker-controlled javaReturnType values to execute arbitrary code.
The issue is triggered when a JsonRpcClient connects to a JSON-RPC service, and the selected class may also be used as the expected type for reply parsing.
2) Improper Certificate Validation (CVE-ID: N/A)
CWE-ID: CWE-295 - Improper Certificate Validation
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:P/PR:N/UI:N/VC:H/VI:H/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to intercept and modify transmitted data.
The vulnerability exists due to improper certificate validation in ConnectionFactory.useSslProtocol() and TrustEverythingTrustManager when establishing TLS connections without explicit trust configuration. A remote attacker can present a crafted certificate to perform a man-in-the-middle attack to intercept and modify transmitted data.
Hostname verification is disabled by default, which further facilitates exploitation.
3) Cleartext transmission of sensitive information (CVE-ID: N/A)
CWE-ID: CWE-319 - Cleartext Transmission of Sensitive Information
CVSSv4: CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Green
The vulnerability allows a remote attacker to disclose sensitive information.
The vulnerability exists due to cleartext transmission of credentials in the default connection configuration when using the default plaintext port with PLAIN SASL. A remote attacker can observe network traffic to disclose sensitive information.
The default port is 5672, and credentials may be sent unencrypted in this configuration.
4) Information disclosure (CVE-ID: N/A)
CWE-ID: CWE-200 - Exposure of sensitive information to an unauthorized actor
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:N/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a local user to disclose sensitive information.
The vulnerability exists due to exposure of plaintext credentials in ConnectionFactory.getPassword() when retrieving stored connection credentials. A local user can read the returned password value to disclose sensitive information.
This may increase the risk of credential exposure in logs or stack traces.
5) Input validation error (CVE-ID: N/A)
CWE-ID: CWE-20 - Improper input validation
CVSSv4: CVSS:4.0/AV:L/AC:L/AT:N/PR:N/UI:A/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N/E:U/U:Clear
The vulnerability allows a remote attacker to cause a denial of service.
The vulnerability exists due to improper input validation in the socket inbound frame reader when processing broker-supplied AMQP frames during connection setup. A remote attacker can send a specially crafted frame larger than the negotiated frame_max to cause a denial of service.
The issue is reachable when the client connects to a malicious or compromised AMQP broker and uses a smaller negotiated frame_max than the inbound body-size limit.
Remediation
Install update from vendor's website.