CVE-2026-5680
Undertow-core: undertow: denial of service via websocket permessage-deflate processing
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
A flaw was found in Undertow. A remote attacker could exploit this vulnerability by sending specially crafted WebSocket messages with permessage-deflate negotiated. This could lead to excessive memory consumption due to the PerMessageDeflateFunction.largerBuffer() method using exponential doubling, resulting in a Denial of Service (DoS) for the affected application.
| CWE | CWE-770 |
| Vendor | red hat |
| Product | red hat build of apache camel for spring boot 4 |
| Published | Aug 27, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Network
Attack Complexity
Low
Privileges Required
None
User Interaction
None
Scope
Unchanged
Confidentiality
None
Integrity
None
Availability
High
Affected Versions
Red Hat / Red Hat build of Apache Camel for Spring Boot 4
All versions affected Red Hat / Red Hat build of Apache Camel - HawtIO 4
All versions affected Red Hat / Red Hat Data Grid 8
All versions affected Red Hat / Red Hat Enterprise Linux 10
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 8
All versions affected Red Hat / Red Hat Enterprise Linux 9
All versions affected Red Hat / Red Hat Fuse 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 7
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 8
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform 8
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack
All versions affected Red Hat / Red Hat JBoss Enterprise Application Platform Expansion Pack
All versions affected Red Hat / Red Hat Process Automation 7
All versions affected Red Hat / Red Hat Single Sign-On 7
All versions affected References
Credits
Red Hat would like to thank Avishek Sarkar and Brian Laub for reporting this issue.