CVE-2026-15561Undertow-core: oom via missing limits in chunked trailer in eap's undertow
Updated under an hour ago ()
Does this affect you?
It affects Red Hat JBoss Enterprise Application Platform 7.4.25 and 2 other products. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
Do this next
Free account, 1 product
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.
- CVSS
- 7.5 HIGH (v3.1, CNA)CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
- Weakness (CWE)
- CWE-770
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- redhat
- NVD analysis
- Awaiting Analysis
- Record last updated
- Oct 16, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Red Hat Red Hat JBoss Enterprise Application Platform 7.4.25 redhat:jboss_enterprise_application_platform | from 2.2.40.SP3-redhat-00001 not affected | CNA record |
Red Hat Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7 redhat:jboss_enterprise_application_platform_els | from 0:2.16.0-22.redhat_00057.1.el7eap not affected | CNA record |
Red Hat Red Hat JBoss Enterprise Application Platform Expansion Pack redhat:jbosseapxp | Versions not stated | CNA record |
References
- https://access.redhat.com/errata/RHSA-2026:53644vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:53645vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:53646vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:53806vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70228vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70229vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70230vendor-advisory, x-refsource-redhat
- https://access.redhat.com/errata/RHSA-2026:70277vendor-advisory, x-refsource-redhat
- https://access.redhat.com/security/cve/CVE-2026-15561vdb-entry, x-refsource-redhat
- https://bugzilla.redhat.com/show_bug.cgi?id=2483133issue-tracking, x-refsource-redhat
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.