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Vulnerability · Published Oct 6, 2026 · Assigned by GitHub_M

CVE-2026-106122RabbitMQ: Malformed UTF-8 in shortstr properties permanently disables RPC consumers

Medium 6.0

In plain English

A medium-severity security flaw in amqp-client from com.rabbitmq. Proof-of-concept exploit code is public. The chance it is exploited in the next 30 days is estimated at 0.5% (higher than 42% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.

Severity (CVSS 4.0)6.0Medium
Exploit odds (30 days)0.5%top 57.6% of all CVEs
Exploited in the wildNo reportsCISA SSVC: poc
Attack toolingNoneno public tooling known

Official description

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.36.0, ValueReader.readShortstr decodes malformed UTF-8 bytes into replacement characters that can re-encode beyond the AMQP shortstr limit enforced by ValueWriter.writeShortstr. An attacker who can submit an RPC message with a malformed echoed property can cause reply publication in RpcServer.mainloop() or tutorial-style consumers to throw an unchecked exception before acknowledgement. The broker requeues the message, allowing the same message to disable replacement consumers until the queue is purged. This issue is fixed in version 5.36.0.

Affected packages & fixed versions

EcosystemPackageFixed inAdvisory
Debian:12rabbitmq-java-clientno fix listedDEBIAN-CVE-2026-106122
Debian:13rabbitmq-java-clientno fix listedDEBIAN-CVE-2026-106122
Mavencom.rabbitmq:amqp-client5.36.0GHSA-7822-rcf6-97fx
Ubuntu:22.04:LTSrabbitmq-java-clientno fix listedUBUNTU-CVE-2026-106122
Ubuntu:24.04:LTSrabbitmq-java-clientno fix listedUBUNTU-CVE-2026-106122
Ubuntu:26.04:LTSrabbitmq-java-clientno fix listedUBUNTU-CVE-2026-106122
Ubuntu:26.10rabbitmq-java-clientno fix listedUBUNTU-CVE-2026-106122

Affected products (as reported)

VendorProductVersions
rabbitmq rabbitmq-java-client < 5.36.0
com.rabbitmq amqp-client < 5.36.0

Weakness: CWE-172, CWE-248 · Vector: CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N

References