redhat/websocket-core-common vulnerabilities

Latest redhat/websocket-core-common CVEs

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1. CVE-2026-19204 org.eclipse.jetty.websocket/websocket-core-common: Jetty: Denial of Service via crafted WebSocket frame with unknown opcode

   Published 2026-09-07

   High·CVSS 8.7 EPSS 0.45%

   A client may send a WebSocket frame with an unknown opcode and a very large declared payload length, causing Jetty to attempt a large memory allocation and potentially exhaust the JVM heap. This occurs when auto-fragmentation is enabled, as unknown opcodes bypass the normal maxim...

Sources: CVE.org, NVD, CISA KEV, FIRST EPSS, OSV and public exploit-reference metadata. Product matching comes from the published CVE records. A proof-of-concept means public code exists; it is not evidence of exploitation.