CVE-2026-15561: Red Hat JBoss Enterprise Application Platform 7

High severity, CVSS 7.5. EPSS: 0.5% chance of exploitation in the next 30 days.

A flaw was found in EAP's undertow http/1.1 chunked-transfer decoder. missing limits on size and count would allow an attacker to use an unauthenticated connection to drive the JVM to an OutOfMemory error, stopping all deployments on the listener, and achieving Denial of Service.

Affected products

  • Red Hat Red Hat JBoss Enterprise Application Platform 7
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25: before 2.2.40.SP3-redhat-00001 (fixed in 2.2.40.SP3-redhat-00001)
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 Els On Rhel 7: before 0:2.16.0-22.redhat_00057.1.el7eap (fixed in 0:2.16.0-22.redhat_00057.1.el7eap); before 0:2.3.14-11.SP11_redhat_00001.1.el7eap (fixed in 0:2.3.14-11.SP11_redhat_00001.1.el7eap); before 0:1.5.26-2.Final_redhat_00001.1.el7eap (fixed in 0:1.5.26-2.Final_redhat_00001.1.el7eap); before 0:2.18.8-1.redhat_00003.1.el7eap (fixed in 0:2.18.8-1.redhat_00003.1.el7eap); before 0:5.0.31-3.SP2_redhat_00001.1.el7eap (fixed in 0:5.0.31-3.SP2_redhat_00001.1.el7eap); before 0:1.10.0-46.Final_redhat_00044.1.el7eap (fixed in 0:1.10.0-46.Final_redhat_00044.1.el7eap); …
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 Els On Rhel 8: before 0:2.16.0-22.redhat_00057.1.el8eap (fixed in 0:2.16.0-22.redhat_00057.1.el8eap); before 0:2.3.14-11.SP11_redhat_00001.1.el8eap (fixed in 0:2.3.14-11.SP11_redhat_00001.1.el8eap); before 0:1.5.26-2.Final_redhat_00001.1.el8eap (fixed in 0:1.5.26-2.Final_redhat_00001.1.el8eap); before 0:2.18.8-1.redhat_00003.1.el8eap (fixed in 0:2.18.8-1.redhat_00003.1.el8eap); before 0:5.0.31-3.SP2_redhat_00001.1.el8eap (fixed in 0:5.0.31-3.SP2_redhat_00001.1.el8eap); before 0:1.10.0-46.Final_redhat_00044.1.el8eap (fixed in 0:1.10.0-46.Final_redhat_00044.1.el8eap); …
  • Red Hat Red Hat JBoss Enterprise Application Platform 7.4 Els On Rhel 9: before 0:2.16.0-22.redhat_00057.1.el9eap (fixed in 0:2.16.0-22.redhat_00057.1.el9eap); before 0:2.3.14-11.SP11_redhat_00001.1.el9eap (fixed in 0:2.3.14-11.SP11_redhat_00001.1.el9eap); before 0:1.5.26-2.Final_redhat_00001.1.el9eap (fixed in 0:1.5.26-2.Final_redhat_00001.1.el9eap); before 0:2.18.8-1.redhat_00003.1.el9eap (fixed in 0:2.18.8-1.redhat_00003.1.el9eap); before 0:5.0.31-3.SP2_redhat_00001.1.el9eap (fixed in 0:5.0.31-3.SP2_redhat_00001.1.el9eap); before 0:1.10.0-46.Final_redhat_00044.1.el9eap (fixed in 0:1.10.0-46.Final_redhat_00044.1.el9eap); …
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For Rhel 10: before 0:2.40.0-8.redhat_00024.1.el10eap (fixed in 0:2.40.0-8.redhat_00024.1.el10eap); before 0:4.1.7-1.SP1_redhat_00001.1.el10eap (fixed in 0:4.1.7-1.SP1_redhat_00001.1.el10eap); before 0:2.0.5-1.Final_redhat_00001.1.el10eap (fixed in 0:2.0.5-1.Final_redhat_00001.1.el10eap); before 0:1.85.0-1.redhat_00001.1.el10eap (fixed in 0:1.85.0-1.redhat_00001.1.el10eap); before 0:1.2.7-1.redhat_00002.1.el10eap (fixed in 0:1.2.7-1.redhat_00002.1.el10eap); before 0:801.8.0-1.GA_redhat_00001.1.el10eap (fixed in 0:801.8.0-1.GA_redhat_00001.1.el10eap); …
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For Rhel 8: before 0:2.40.0-8.redhat_00024.1.el8eap (fixed in 0:2.40.0-8.redhat_00024.1.el8eap); before 0:4.1.7-1.SP1_redhat_00001.1.el8eap (fixed in 0:4.1.7-1.SP1_redhat_00001.1.el8eap); before 0:2.0.5-1.Final_redhat_00001.1.el8eap (fixed in 0:2.0.5-1.Final_redhat_00001.1.el8eap); before 0:1.85.0-1.redhat_00001.1.el8eap (fixed in 0:1.85.0-1.redhat_00001.1.el8eap); before 0:1.2.7-1.redhat_00002.1.el8eap (fixed in 0:1.2.7-1.redhat_00002.1.el8eap); before 0:801.8.0-1.GA_redhat_00001.1.el8eap (fixed in 0:801.8.0-1.GA_redhat_00001.1.el8eap); …
  • Red Hat Red Hat JBoss Enterprise Application Platform 8.1 For Rhel 9: before 0:2.40.0-8.redhat_00024.1.el9eap (fixed in 0:2.40.0-8.redhat_00024.1.el9eap); before 0:4.1.7-1.SP1_redhat_00001.1.el9eap (fixed in 0:4.1.7-1.SP1_redhat_00001.1.el9eap); before 0:2.0.5-1.Final_redhat_00001.1.el9eap (fixed in 0:2.0.5-1.Final_redhat_00001.1.el9eap); before 0:1.85.0-1.redhat_00001.1.el9eap (fixed in 0:1.85.0-1.redhat_00001.1.el9eap); before 0:1.2.7-1.redhat_00002.1.el9eap (fixed in 0:1.2.7-1.redhat_00002.1.el9eap); before 0:801.8.0-1.GA_redhat_00001.1.el9eap (fixed in 0:801.8.0-1.GA_redhat_00001.1.el9eap); …
  • Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack

Published 2026-08-11. Last modified 2026-09-25.