CVE-2026-5680
7.5
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.40.0-8.redhat_00024.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:4.1.7-1.SP1_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.0.5-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:1.85.0-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:1.2.7-1.redhat_00002.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:801.8.0-1.GA_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:6.6.54-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:4.1.5-5.redhat_00008.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:3.0.22-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.18.9-1.redhat_00003.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.18.9-1.redhat_00003.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.18.9-1.redhat_00003.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.18.9-1.redhat_00003.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.18.9-1.redhat_00003.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.18.9-1.redhat_00003.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.18.9-1.redhat_00003.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:4.0.5-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:4.0.7-4.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.1.0-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:3.6.3-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:5.0.31-1.SP2_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:3.1.0-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.2.0-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:7.4.0-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:3.0.1-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:5.1.0-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:4.0.11-2.SP1_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.25.4-1.redhat_00003.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:3.2.2-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:4.1.136-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:4.1.136-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:9.37.4-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:1.1.9-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:3.0.6-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.0.18-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.3.26-2.SP3_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:8.1.8-9.GA_redhat_00006.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.6.11-1.Final_redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:8.1.1-12.GA_redhat_00048.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:2.3.2-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10 | 0:3.0.6-1.redhat_00001.1.el10eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.40.0-8.redhat_00024.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:4.1.7-1.SP1_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.0.5-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:1.85.0-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:1.2.7-1.redhat_00002.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:801.8.0-1.GA_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:6.6.54-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:4.1.5-5.redhat_00008.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:3.0.22-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.18.9-1.redhat_00003.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.18.9-1.redhat_00003.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.18.9-1.redhat_00003.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.18.9-1.redhat_00003.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.18.9-1.redhat_00003.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.18.9-1.redhat_00003.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.18.9-1.redhat_00003.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:4.0.5-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:4.0.7-4.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.1.0-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:3.6.3-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:5.0.31-1.SP2_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:3.1.0-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.2.0-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:7.4.0-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:3.0.1-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:5.1.0-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:4.0.11-2.SP1_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.25.4-1.redhat_00003.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:3.2.2-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:4.1.136-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:4.1.136-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:9.37.4-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:1.1.9-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:3.0.6-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.0.18-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.3.26-2.SP3_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:8.1.8-9.GA_redhat_00006.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.6.11-1.Final_redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:8.1.1-12.GA_redhat_00048.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:2.3.2-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 8 | 0:3.0.6-1.redhat_00001.1.el8eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.40.0-8.redhat_00024.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:4.1.7-1.SP1_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.0.5-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:1.85.0-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:1.2.7-1.redhat_00002.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:801.8.0-1.GA_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:6.6.54-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:4.1.5-5.redhat_00008.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:3.0.22-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.18.9-1.redhat_00003.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.18.9-1.redhat_00003.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.18.9-1.redhat_00003.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.18.9-1.redhat_00003.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.18.9-1.redhat_00003.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.18.9-1.redhat_00003.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.18.9-1.redhat_00003.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:4.0.5-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:4.0.7-4.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.1.0-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:3.6.3-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:5.0.31-1.SP2_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:3.1.0-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.2.0-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:7.4.0-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:3.0.1-1.Final_redhat_00001.1el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:5.1.0-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:4.0.11-2.SP1_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.25.4-1.redhat_00003.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:3.2.2-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:4.1.136-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:4.1.136-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:9.37.4-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:1.1.9-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:3.0.6-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.0.18-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.3.26-2.SP3_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:8.1.8-9.GA_redhat_00006.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.6.11-1.Final_redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:8.1.1-12.GA_redhat_00048.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:2.3.2-1.redhat_00001.1.el9eap < * | unaffected |
| Red Hat | Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 9 | 0:3.0.6-1.redhat_00001.1.el9eap < * | unaffected |
Weaknesses
- CWE-770: Allocation of Resources Without Limits or Throttling
Workarounds
To mitigate this issue, configure the PerMessageDeflateHandshake to limit the maximum decompressed buffer size. This can be achieved by setting the maxDecompressedBufferSize parameter to a reasonable value (e.g., 10 MB) in the PerMessageDeflateHandshake constructor. This action may require a restart of the affected application or service to take effect.
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
- 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
Feedback
Was this page helpful?
Glad to hear it! Please tell us how we can improve.
Sorry to hear that. Please tell us how we can improve.