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CVE-2026-61634: rabbitmq rabbitmq-java-client Improper Input Validation

CVSS: 0.0v4.0UnknownAwaiting analysis
AliasesUBUNTU-CVE-2026-61634DEBIAN-CVE-2026-61634CGA-2hwf-xhpw-cv2h
Published 18-08-2026Last modified 18-08-2026
Open JSON

Vulnerability summary

CVE-2026-61634 is a Improper Input Validation vulnerability in rabbitmq rabbitmq-java-client with no CVSS score yet. EPSS estimates a 0.49% chance of exploitation in the next 30 days, higher than 40.7% of scored vulnerabilities.

Overall risk
0/100
0100
Minimal · default modelHow is this calculated?
CVSS score
0.0/10
010
Unknown · v4.0 (CVE.org)
EPSS score
0.49%
0%100%
Low · +0.19 pp in 30 days
KEVNot listedIn no KEV catalog
RansomwareNone recordedNo known use recorded
Public exploits0No public exploits recorded

Advisory lineage

Upstream 0 · Downstream 0 · Related 1
CGA-8RR9-62HV-H636

Timeline

  1. 18-08-2026
    PublishedVulnerability first disclosed.
  2. 18-08-2026
    Last modifiedVulnerability information updated.

Description

The RabbitMQ Java client library allows Java and JVM-based applications to connect to and interact with RabbitMQ nodes. Prior to 5.33.0, the AMQP connection tuning path records the negotiated AMQP frame_max value, but src/main/java/com/rabbitmq/client/impl/SocketFrameHandler.java and NettyFrameHandlerFactory continue to validate broker-controlled frame payload lengths against maxInboundMessageBodySize because the negotiated limit is not applied consistently through setMaxInboundFramePayloadSize. A malicious or compromised broker can send a method frame larger than the negotiated frame_max during or after connection establishment, causing the client to allocate and decode a protocol-invalid frame instead of rejecting it with MalformedFrameException. The protocol violation can disrupt the affected connection and cause client-side denial of service. This issue is fixed in version 5.33.0.

CVSS metrics

7 scores · 7 sources · 1 version

EPSS trend

Probability

0.49%

Chance of exploitation in the next 30 days

Percentile

41%

Versus all other CVEs

30-day change

+0.19 pp

From 0.30% on 19-09-2026

19-09-202619-10-2026
EPSS score
0.49%

Known exploited

Compare KEV catalogs

Not in any of the 3 tracked catalogs.

Public exploits

0 found

No public exploits indexed.

Weaknesses

CWE · root cause

Affected systems

Chainguard26 products
  • cassandra-reaper< 5.0.0-r9
  • conductor< 3.32.1-r3
  • conductor-fips< 3.32.1-r1
  • druid< 37.0.0-r54 | < 37.0.0-r56
  • logstash-8.19< 8.19.20-r1
Wolfi9 products
  • cassandra-reaper< 5.0.0-r9
  • druid< 37.0.0-r54 | < 37.0.0-r56
  • logstash-9.3All versions (No fix recorded)
  • logstash-9.3-iamguarded-compatAll versions (No fix recorded)
  • logstash-9.4< 9.4.5-r3
Com.rabbitmq1 product
  • amqp-client< 5.33.0
Debian1 product
  • rabbitmq-java-clientAll versions (No fix recorded)
Rabbitmq1 product
Ubuntu1 product
  • rabbitmq-java-clientAll versions (No fix recorded)

6 vendors · 39 products

References

12 links
Show all 12 references