CVE-2026-19204
8.7
CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
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.
Affected Software
| Vendor | Product | Version Range | Status |
|---|---|---|---|
| Eclipse Foundation | Eclipse Jetty | 12.1.0 <= 12.1.11 | affected |
| Eclipse Foundation | Eclipse Jetty | 12.0.0 <= 12.0.37 | affected |
| Eclipse Foundation | Eclipse Jetty | 11.0.0 <= 11.0.31 | affected |
| Eclipse Foundation | Eclipse Jetty | 10.0.0 <= 10.0.31 | affected |
Weaknesses
- CWE-770: CWE-770 Allocation of resources without limits or throttling
- CWE-789: CWE-789 Memory allocation with excessive size value
ADP Enrichment
CISA ADP Vulnrichment
- SSVC:
- Exploitation: none
- Automatable: yes
- Technical Impact: partial
References
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