CVE-2026-155617.5HighCWE-770

CVE-2026-15561: Undertow-core: oom via missing limits in chunked trailer in eap's undertow

Red Hat · Red Hat JBoss Enterprise Application Platform 7.4.25

Vendor fix available · Affected: Red Hat JBoss Enterprise Application Platform 7.4.25 · Exploitation: unlikely (under 1%)

Not in CyberSIXT coverage yet: no article names this CVE. This page shows the public record.

0.7%probability of exploitation in the next 30 days

54th percentile

050100

Higher than 54% of scored CVEs

7.5HighCVSS 3.1

LowMediumHighCrit.

DescriptionCVE.org

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 products20

From the CVE record. A product or version that is not listed is unknown, not unaffected.

Red Hat · Red Hat JBoss Enterprise Application Platform 7.4.25Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 7.4 ELS on RHEL 7Versions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 8.1.8.GAVersions not stated
Red Hat · Red Hat JBoss Enterprise Application Platform 8.1 for RHEL 10Versions not stated

On the Atlas

Every published CVE is on the CyberSIXT Atlas, grouped by weakness, vendor and month.

Open the Atlas

Exploitation: Unlikely (under 1%). EPSS under 1%, or no score yet.
CISA KEV: Not listed
Public check: No public nuclei template
Weakness: Allocation Without Limits · Denial of Service
Vendor: Red Hat
Published: August 2026
Band: Unlikely (under 1%), August 2026

CoverageNo articles yet

No CyberSIXT article names CVE-2026-15561 yet, so there is no coverage timeline, action brief or change log for it. Everything on this page comes from the public CVE record, CISA KEV, EPSS and the nuclei template index. Search the archive or see the CVEs in the news.