Is CVE-2026-15561 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-15561?

CVE-2026-15561 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-15561

Description

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.