Resource exhaustion in Red Hat Jboss Enterprise Application Platform 7
CVE-2026-15561
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.
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.004 (36.4th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 36th percentile — 36.4% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.003 · newest: 0.004 · change: +0.001
Affected products
- Red Hat Jboss Enterprise Application Platform 7
- Red Hat Jboss Enterprise Application Platform 7.4.25
- Red Hat Jboss Enterprise Application Platform 7.4 Els On Rhel 7 — versions 0:2.16.0-22.redhat_00057.1.el7eap, 0:2.3.14-11.SP11_redhat_00001.1.el7eap, 0:1.5.26-2.Final_redhat_00001.1.el7eap
- Red Hat Jboss Enterprise Application Platform 8
- Red Hat Jboss Enterprise Application Platform Expansion Pack
Weakness classification (CWE)
References
- access.redhat.com/security/cve/CVE-2026-15561 (vdb-entry)
- bugzilla.redhat.com/show_bug.cgi (issue-tracking)
- access.redhat.com/errata/RHSA-2026:53644 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53806 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53645 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:53646 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:70228 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:70229 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:70230 (vendor-advisory)
- access.redhat.com/errata/RHSA-2026:70277 (vendor-advisory)
Frequently asked questions
- What is CVE-2026-15561?
- CVE-2026-15561 is a high-severity vulnerability in Red Hat Jboss Enterprise Application Platform 7, classified under Allocation of Resources Without Limits or Throttling. CVSS score: 7.5/10. Published 2026-08-11.
- How severe is CVE-2026-15561?
- High severity. CVSS v3 base score is 7.5 out of 10.