GHSA-qx7j-jv8m-fppr

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Source
https://github.com/advisories/GHSA-qx7j-jv8m-fppr
Import Source
https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-qx7j-jv8m-fppr/GHSA-qx7j-jv8m-fppr.json
JSON Data
https://api.osv.dev/v1/vulns/GHSA-qx7j-jv8m-fppr
Aliases
Downstream
CGA (49)
ECHO (1)
MINI (12)
Published
2026-08-18T16:32:42Z
Modified
2026-09-10T03:50:54Z
Severity
  • 6.3 (Medium) CVSS_V4 - CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:H CVSS Calculator
Summary
RabbitMQ Java client malformed body frame triggers raw command assembler exception
Details

Summary

RabbitMQ Java Client's inbound AMQP command assembly accepts a content header declaring a small body and then processes a larger body frame by throwing a raw UnsupportedOperationException from CommandAssembler. A broker peer that the client has connected to can use this malformed frame sequence to fail frame processing and tear down the client connection instead of receiving a clean protocol-level malformed-frame error.

This was discovered based on an existing vulnerability CVE-2017-15699.

Details

Inbound frames enter the client through SocketFrameHandler.readFrame, which returns frames parsed from the peer-controlled input stream (src/main/java/com/rabbitmq/client/impl/SocketFrameHandler.java:197). AMQConnection.MainLoop reads each frame (src/main/java/com/rabbitmq/client/impl/AMQConnection.java:692) and dispatches non-zero-channel frames to the channel while the connection is open (src/main/java/com/rabbitmq/client/impl/AMQConnection.java:748 and src/main/java/com/rabbitmq/client/impl/AMQConnection.java:766). The channel then passes the frame to the current command assembler through AMQChannel.handleFrame and AMQCommand.handleFrame (src/main/java/com/rabbitmq/client/impl/AMQChannel.java:121, src/main/java/com/rabbitmq/client/impl/AMQCommand.java:114). When a content-bearing method is followed by a content header, CommandAssembler.consumeHeaderFrame records the header's declared body size in remainingBodyBytes after only checking it against the configured maximum (src/main/java/com/rabbitmq/client/impl/CommandAssembler.java:126 through src/main/java/com/rabbitmq/client/impl/CommandAssembler.java:139). The body-frame path subtracts the received payload length from that remaining count before validating that the payload fits (src/main/java/com/rabbitmq/client/impl/CommandAssembler.java:145 through src/main/java/com/rabbitmq/client/impl/CommandAssembler.java:149), so a body frame larger than the declared size drives the count negative and reaches the raw UnsupportedOperationException at src/main/java/com/rabbitmq/client/impl/CommandAssembler.java:150 and src/main/java/com/rabbitmq/client/impl/CommandAssembler.java:151. AMQConnection catches the resulting throwable in frame processing and performs connection failure handling and final shutdown (src/main/java/com/rabbitmq/client/impl/AMQConnection.java:695 through src/main/java/com/rabbitmq/client/impl/AMQConnection.java:705).

PoC

poc.zip

bash ./poc/run.sh

Exception in thread "main" java.lang.UnsupportedOperationException: %%%%%% FIXME unimplemented

The UnsupportedOperationException: %%%%%% FIXME unimplemented fingerprint is the raw exception thrown at the negative remainingBodyBytes check in CommandAssembler.consumeBodyFrame. This line shows the malformed declared-size/body-size sequence reached the vulnerable assembler path.

Impact

The attacker model is a remote AMQP broker peer that the RabbitMQ Java Client application has accepted, including a malicious broker endpoint, a compromised broker, or routing that sends the client to an attacker-controlled peer. The peer needs a non-zero open channel that can receive a content-bearing server-to-client method such as basic.deliver, then sends the method frame, a content header declaring a body below the configured maximum, and a body frame whose payload exceeds that declared size. Under those conditions, the peer can force frame processing to fail with UnsupportedOperationException and close the AMQP connection, producing a client-side denial of service for work depending on that connection; the finding does not indicate memory corruption, data disclosure, or code execution.

Database specific 
{
    "cwe_ids":  [
        "CWE-20"
    ],
    "github_reviewed":  true,
    "github_reviewed_at":  "2026-08-18T16:32:42Z",
    "nvd_published_at":  null,
    "severity":  "MODERATE"
}
References

Affected packages

Maven / com.rabbitmq:amqp-client

Package

Name
com.rabbitmq:amqp-client
View open source insights on deps.dev
Purl
pkg:maven/com.rabbitmq/amqp-client

Affected ranges

Type
ECOSYSTEM
Events
Introduced
0 Unknown introduced version / All previous versions are affected
Fixed
5.31.0

Affected versions

1.*
1.3.0
1.5.4
1.5.5
1.6.0
1.7.2
1.8.0
1.8.1
2.*
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.*
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.*
4.0.0
4.0.1
4.0.2
4.0.3
4.1.0
4.1.1
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
4.10.0
4.11.0
4.11.1
4.11.2
4.11.3
4.12.0
5.*
5.0.0
5.1.0
5.1.1
5.1.2
5.2.0
5.3.0
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
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
5.20.0
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
5.30.0

Database specific

last_known_affected_version_range 
"<= 5.30.0"
source 
"https://github.com/github/advisory-database/blob/main/advisories/github-reviewed/2026/08/GHSA-qx7j-jv8m-fppr/GHSA-qx7j-jv8m-fppr.json"