High severity7.5NVD Advisory· Published Sep 18, 2026· Updated Oct 15, 2026
CVE-2026-93488
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.
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Affected products
2Patches
Vulnerability mechanics
References
8- access.redhat.com/errata/RHSA-2026:69440nvd
- access.redhat.com/errata/RHSA-2026:69470nvd
- access.redhat.com/errata/RHSA-2026:70257nvd
- access.redhat.com/errata/RHSA-2026:83612nvd
- access.redhat.com/security/cve/CVE-2026-93488nvd
- bugzilla.redhat.com/show_bug.cginvd
- github.com/netty/netty/releases/tag/netty-4.1.138.Finalnvd
- github.com/netty/netty/releases/tag/netty-4.2.18.Finalnvd
News mentions
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