CVE-2026-61634
published 2026-08-18CVE-2026-61634: 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…
PriorityP421low7.5CVSS 4.0
AVNACHATPPRNUINVCNVINVANSCNSINSANEXCRXIRXARXMAVXMACXMATXMPRXMUIXMVCXMVIXMVAXMSCXMSIXMSAXSXAUXRXVXREXUX
EPSS
0.49%
41.1th percentile
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.
Affected
1 ranges
| Vendor | Product | Version range | Fixed in |
|---|---|---|---|
| rabbitmq | rabbitmq-java-client | < 5.33.0 | 5.33.0 |
CVSS provenance
nvdv4.00.0NONECVSS:4.0/AV:N/AC:H/AT:P/PR:N/UI:N/VC:N/VI:N/VA:N/SC:N/SI:N/SA:N/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
ghsa7.5HIGH
vendor_redhat7.5NONE
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GHSA
RabbitMQ Java client accepts broker frames larger than the negotiated AMQP frame_max
ghsa·2026-08-18·CVSS 7.5
CVE-2026-61634 [HIGH] CWE-20 RabbitMQ Java client accepts broker frames larger than the negotiated AMQP frame_max
RabbitMQ Java client accepts broker frames larger than the negotiated AMQP frame_max
## Summary
The max body size was enforced to patch CVE-2023-46120, but even though that limit still works, the frame size itself still exceeds the given max size.
## Root cause
The Java client records the AMQP 0-9-1 `frame_max` negotiated during connection tuning, but the socket inbound frame reader continues to validate broker-controlled payload lengths against the much larger `maxInboundMessageBodySize` limit. A broker peer can therefore send a method frame whose payload is larger than the negotiated `frame_max`, have it allocated and decoded, and complete the connection handshake instead of being rejected as a protocol violation.
*Reported by Team Atlanta.*
Red Hat
com.rabbitmq/amqp-client: RabbitMQ Java client: Denial of Service via oversized AMQP frames
vendor_redhat·2026-08-18·CVSS 7.5
CVE-2026-61634 [NONE] CWE-805 com.rabbitmq/amqp-client: RabbitMQ Java client: Denial of Service via oversized AMQP frames
com.rabbitmq/amqp-client: RabbitMQ Java client: Denial of Service via oversized AMQP frames
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 in
No detection rules found.
No public exploits indexed.
Wiz
CVE-2025-61634 Impact, Exploitability, and Mitigation Steps | Wiz
blogs_wiz·CVSS 5.1
CVE-2025-61634 [MEDIUM] CVE-2025-61634 Impact, Exploitability, and Mitigation Steps | Wiz
## CVE-2025-61634 :
NixOS vulnerability analysis and mitigation
Vulnerability in Wikimedia Foundation MediaWiki. This vulnerability is associated with program files includes/Rest/Handler/PageHTMLHandler.Php.
This issue affects MediaWiki: from * before 1.39.14, 1.43.4, 1.44.1.
Source : NVD
Published February 3, 2026
Severity NONE
CNA Score N/A
Affected Technologies
NixOS
Linux Debian
Has Public Exploit No
Has CISA KEV Exploit No
CISA KEV Release Date N/A
CISA KEV Due Date N/A
Exploitation Probability Percentile (EPSS) 0.4
Exploitation Probability (EPSS) N/A
Affected packages and libraries
mediawiki
Sources
NVD
Debian 13, 14 Severity LOW Has Fix Added at: Oct 03, 2025
Nix Severity LOW Has Fix Added at: Mar 19, 2026
## Get a CVE risk assessment
Get a prioritized view
Bugzilla
CVE-2025-61634 mediawiki: MediaWiki: Vulnerability in page handling requiring user interaction [fedora-42]
bugzilla·2026-02-03
CVE-2025-61634 [NONE] CVE-2025-61634 mediawiki: MediaWiki: Vulnerability in page handling requiring user interaction [fedora-42]
CVE-2025-61634 mediawiki: MediaWiki: Vulnerability in page handling requiring user interaction [fedora-42]
Disclaimer: Community trackers are created by Red Hat Product Security team on a best effort basis. Package maintainers are required to ascertain if the flaw indeed affects their package, before starting the update process.
Discussion:
This message is a reminder that Fedora Linux 42 is nearing its end of life.
Fedora will stop maintaining and issuing updates for Fedora Linux 42 on 2026-05-13.
It is Fedora's policy to close all bug reports from releases that are no longer
maintained. At that time this bug will be closed as EOL if it remains open with a
'version' of '42'.
Package Maintainer: If you wish for this bug to remain open because you
plan to fix it in a currently maintained
https://github.com/rabbitmq/rabbitmq-java-client/commit/08790f09686173eb17b48d08a25edcb32e71a591https://github.com/rabbitmq/rabbitmq-java-client/commit/b491075f42e89967610c40beded68d3680cfd472https://github.com/rabbitmq/rabbitmq-java-client/pull/1994https://github.com/rabbitmq/rabbitmq-java-client/pull/1995https://github.com/rabbitmq/rabbitmq-java-client/releases/tag/v5.33.0https://github.com/rabbitmq/rabbitmq-java-client/security/advisories/GHSA-5xwg-cfvj-gff5
2026-08-18
Published