UBUNTU-CVE-2026-63337

See a problem?
Please try reporting it to the source first.
Source
https://ubuntu.com/security/CVE-2026-63337
Import Source
https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63337.json
JSON Data
https://api.osv.dev/v1/vulns/UBUNTU-CVE-2026-63337
Upstream
Published
2026-08-18T17:17:00Z
Modified
2026-09-02T19:35:54Z
Severity
  • 7.5 (High) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:P/VC:H/VI:H/VA:H/SC:L/SI:L/SA:L CVSS Calculator
  • Ubuntu - medium
Summary
[none]
Details

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.0, com.rabbitmq.tools.jsonrpc.ProcedureDescription receives a javaReturnType value in an untrusted system.describe response and passes it through JSONUtil.tryFill, setJavaReturnType, and computeReturnTypeAsJavaClass to Class.forName(javaReturnType) with initialization enabled. An attacker able to answer the JsonRpcClient request through a shared broker or network interception can select a class already present in the victim JVM and trigger its static initializer, while JsonRpcClient.java later passes getReturnType output to mapper.parse and may also create type confusion. Successful exploitation can affect confidentiality, integrity, and availability in the client process. This issue is fixed in version 5.33.0.

References

Affected packages

Ubuntu:18.04:LTS / rabbitmq-java-client

Package

Name
rabbitmq-java-client
Purl
pkg:deb/ubuntu/rabbitmq-java-client?arch=source&distro=bionic

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.0.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63337.json"

Ubuntu:20.04:LTS / rabbitmq-java-client

Package

Name
rabbitmq-java-client
Purl
pkg:deb/ubuntu/rabbitmq-java-client?arch=source&distro=focal

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.0.0-1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63337.json"

Ubuntu:22.04:LTS / rabbitmq-java-client

Package

Name
rabbitmq-java-client
Purl
pkg:deb/ubuntu/rabbitmq-java-client?arch=source&distro=jammy

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.0.0-1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63337.json"

Ubuntu:24.04:LTS / rabbitmq-java-client

Package

Name
rabbitmq-java-client
Purl
pkg:deb/ubuntu/rabbitmq-java-client?arch=source&distro=noble

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.0.0-1.1

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-1.1"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63337.json"

Ubuntu:26.04:LTS / rabbitmq-java-client

Package

Name
rabbitmq-java-client
Purl
pkg:deb/ubuntu/rabbitmq-java-client?arch=source&distro=resolute

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected

Affected versions

5.*
5.0.0-1.1
5.0.0-2

Ecosystem specific 

{
    "binaries": [
        {
            "binary_name": "librabbitmq-client-java",
            "binary_version": "5.0.0-2"
        }
    ]
}

Database specific

source 
"https://github.com/canonical/ubuntu-security-notices/blob/main/osv/cve/2026/UBUNTU-CVE-2026-63337.json"