HIGH 8.7 NVD

CVE-2026-19204

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 pote

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 maximum frame size handling and payload allocation occurs before the opcode is validated.

References

https://github.com/jetty/jetty.project/security/advisories/GHSA-85fq-fc5f-7j7g

Published: 2026-09-07 · Source: NVD · Feed updated: 2026-09-07

This high severity vulnerability with a CVSS score of 8.7 was published on 2026-09-07 via NVD.

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