CVE-2026-5680
CVE-2026-5680 · Undertow-core: undertow: denial of service via websocket permessage-deflate processing
This page contains facts from public vulnerability sources. Check the original advisory before updating.
This page shows selected source facts. See the linked advisories for the complete description and affected versions.
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 7.5 · High · EPSS 1.1%
- Published
- Updated
Stack: system
Affected products and versions
red hat jboss enterprise application platform 8.1.8.ga
- Versions
- ≥ 2.3.26.SP3-redhat-00001: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:2.40.0-8.redhat_00024.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:4.1.7-1.SP1_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:2.0.5-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:1.85.0-1.redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:1.2.7-1.redhat_00002.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:801.8.0-1.GA_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:6.6.54-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:4.1.5-5.redhat_00008.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:3.0.22-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:2.18.9-1.redhat_00003.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:4.0.5-1.redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:4.0.7-4.redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:2.1.0-1.redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:3.6.3-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:5.0.31-1.SP2_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:3.1.0-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:2.2.0-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:7.4.0-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:3.0.1-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:5.1.0-1.Final_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:4.0.11-2.SP1_redhat_00001.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:2.25.4-1.redhat_00003.1.el10eap: Not affected (rpm)
No fix published
red hat jboss enterprise application platform 8.1 for rhel 10
- Versions
- ≥ 0:3.2.2-1.redhat_00001.1.el10eap: Not affected (rpm)
No fix published
Original sources
- https://access.redhat.com/errata/RHSA-2026:70228
- https://access.redhat.com/errata/RHSA-2026:70229
- https://access.redhat.com/errata/RHSA-2026:70230
- https://access.redhat.com/errata/RHSA-2026:70277
- https://access.redhat.com/security/cve/CVE-2026-5680
- https://bugzilla.redhat.com/show_bug.cgi?id=2455350
- https://nvd.nist.gov/vuln/detail/CVE-2026-5680