7.5
High
CVE-2026-5680 Undertow-core: undertow: denial of service via websocket permessage-deflate processing
Description
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.
CVSS 3.1 detail
Vector CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:HExploitable remotely over the network, without an account and without any user action; an attacker can seriously compromise confidentiality, integrity or availability.
- Attack vector
- Network
- Attack complexity
- Low
- Privileges required
- None
- Interaction
- None
- Scope
- Unchanged
- Confidentiality
- None
- Integrity
- None
- Availability
- High
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat build of Apache Camel for Spring Boot 4 | Versions not published | |
| Red Hat build of Apache Camel - HawtIO 4 | Versions not published | |
| Red Hat Data Grid 8 | Versions not published | |
| Red Hat Enterprise Linux 10 | Versions not published | |
| Red Hat Enterprise Linux 8 | Versions not published | |
| Red Hat Enterprise Linux 9 | Versions not published | |
| Red Hat Fuse 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8 | Versions not published |
Show the 8 other branches Hide the 8 other branches
| Product | Affected versions | Fixed in |
|---|---|---|
| Red Hat JBoss Enterprise Application Platform Expansion Pack | Versions not published | |
| Red Hat Process Automation 7 | Versions not published | |
| Red Hat Single Sign-On 7 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1 | Versions not published | |
| Red Hat JBoss Enterprise Application Platform 8.1.8.GA 2.3 | earliest → < 2.3.26.SP3-redhat-00001 | 2.3.26.SP3-redhat-00001 |
References
- RHSA-2026:70228 access.redhat.com
- RHSA-2026:70229 access.redhat.com
- RHSA-2026:70230 access.redhat.com
- RHSA-2026:70277 access.redhat.com
- access.redhat.com access.redhat.com
- RHBZ#2455350 bugzilla.redhat.com
Timeline
- Published
- Last modified
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