Is CVE-2026-93488 being exploited?

No public exploit is currently tracked.

How severe is CVE-2026-93488?

CVE-2026-93488 has a CVSS v3 severity of HIGH (7.5).

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CVE-2026-93488

Description

A flaw was found in Netty. SpdySessionHandler accepts an unlimited number of concurrent remote-initiated streams because localConcurrentStreams defaults to Integer.MAX_VALUE and the handler provides no API to change it. A remote peer can open a SPDY connection and send a large number of SYN_STREAM frames with FLAG_FIN=0, causing unbounded heap and direct memory allocation that can lead to JVM OutOfMemoryError and a denial of service.