CVE catalog
CVE-2026-63335
rabbitmq-java-client: CVE-2026-63335
- Severity
- Medium · CVSS 6.3
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - Published
- Source
- [NVD] · [CVE record]
- EPSS
- 0.52% · Oct 25, 2026
The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.31.0, inbound AMQP command assembly in src/main/java/com/rabbitmq/client/impl/CommandAssembler.java processes a content-bearing method and header whose remainingBodyBytes value is smaller than a following AMQP.FRAME_BODY payload. CommandAssembler.consumeBodyFrame subtracts the peer-controlled payload length before validating that it fits, drives remainingBodyBytes negative, and throws a raw UnsupportedOperationException instead of MalformedFrameException. A malicious or compromised broker peer can send this malformed sequence on an open nonzero channel to terminate frame processing and close the client connection, causing denial of service for work using that connection. This issue is fixed in version 5.31.0.
Vulnerable and fixed packages
Distribution-reported package versions and fixes. These do not depend on matching against the OpenFactory package catalog.
| Distribution | Package | Release | Version | Status |
|---|---|---|---|---|
| Debian | rabbitmq-java-client | sid | 5.0.0-2 | vulnerable |
| Debian | rabbitmq-java-client | trixie | 5.0.0-1.1 | vulnerable |
| Debian | rabbitmq-java-client | bookworm | 5.0.0-1.1 | vulnerable |
| Maven | com.rabbitmq:amqp-client | Not reported | 5.31.0 | fixed |
Fixed-version evidence
| Distribution | Package | Type | Release | Fixed version | Urgency | Origin | Bugs |
|---|---|---|---|---|---|---|---|
| Debian | rabbitmq-java-client | source | sid | (unfixed) | not yet assigned | Not reported | [1144958] |
| Debian | rabbitmq-java-client | source | trixie | (unfixed) | not yet assigned | Not reported | [1144958] |
| Debian | rabbitmq-java-client | source | bookworm | (unfixed) | not yet assigned | Not reported | [1144958] |
| Maven | com.rabbitmq:amqp-client | maven | Not reported | 5.31.0 | Not reported | GHSA-QX7J-JV8M-FPPR | Not reported |
Notes
[trixie] rabbitmq-java-client: Minor issue [bookworm] rabbitmq-java-client: Minor issue
OpenFactory catalog packages
[Debian 12 (Bookworm)]
- [librabbitmq-client-java]Affected
Source package: [rabbitmq-java-client]
Details (2)
5.0.0-1.1· all · bookwormAffected
dsa · rabbitmq-java-client · debian · bookworm; dsa · rabbitmq-java-client · debian · 12
5.0.0-1.1· all · bookwormAffected
dsa · rabbitmq-java-client · debian · bookworm; dsa · rabbitmq-java-client · debian · 12
[Debian 13 (Trixie)]
- [librabbitmq-client-java]Affected
Source package: [rabbitmq-java-client]
Details (2)
5.0.0-1.1· all · trixieAffected
dsa · rabbitmq-java-client · debian · 13
5.0.0-1.1· all · trixieAffected
dsa · rabbitmq-java-client · debian · 13
Observed:
References
- [https://github.com/advisories/GHSA-qx7j-jv8m-fppr]
- [https://nvd.nist.gov/vuln/detail/CVE-2026-63335]
- [https://osv.dev/vulnerability/DEBIAN-CVE-2026-63335]
- [https://security-tracker.debian.org/tracker/CVE-2026-63335]
- [https://wid.cert-bund.de/.well-known/csaf/white/2026/wid-sec-w-2026-2921.json]
[CERT-Bund public advisories] · [Debian Security Tracker] · [FIRST EPSS] · [GitHub Advisory Database] · [National Vulnerability Database (NVD)] · [OSV Package Vulnerability Database]