{"id":"CVE-2026-93488","published":"2026-09-18T12:17:30.667","lastModified":"2026-09-22T23:17:07.980","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.","cvssScore":7.5,"cvssSeverity":"HIGH","cvssVector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H","cwes":["CWE-770"],"vendors":[],"products":[],"references":[{"url":"https://access.redhat.com/errata/RHSA-2026:69440","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:69470","tags":[]},{"url":"https://access.redhat.com/errata/RHSA-2026:70257","tags":[]},{"url":"https://access.redhat.com/security/cve/CVE-2026-93488","tags":[]},{"url":"https://bugzilla.redhat.com/show_bug.cgi?id=2536887","tags":[]},{"url":"https://github.com/netty/netty/releases/tag/netty-4.1.138.Final","tags":[]},{"url":"https://github.com/netty/netty/releases/tag/netty-4.2.18.Final","tags":[]}],"exploitRefs":[{"url":"https://github.com/netty/netty/releases/tag/netty-4.1.138.Final","tags":[]},{"url":"https://github.com/netty/netty/releases/tag/netty-4.2.18.Final","tags":[]}],"hasPoc":true,"ai":null}