CVE-2026-19204A 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.
Updated under an hour ago ()
Does this affect you?
It affects Eclipse Foundation Eclipse Jetty. Add what you run to find out whether that includes you.
No exploitation reported and no EPSS estimate yet.
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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.
- CVSS
- 8.7 HIGH (v4.0, CNA)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
- Weakness (CWE)
- CWE-770, CWE-789
- Known exploited
- Not in CISA's KEV catalog
- EPSS (exploitation in the next 30 days)
- Not loaded for this CVE
- Assigned by
- eclipse
- NVD analysis
- Deferred
- Record last updated
- Sep 8, 2026
- First seen by InfoSec Signals
- Oct 9, 2026
Affected products
Eclipse Foundation Eclipse Jetty eclipse_foundation:eclipse_jetty (from the name) | from 12.1.0 through 12.1.11; from 12.0.0 through 12.0.37; from 11.0.0 through 11.0.31; from 10.0.0 through 10.0.31 | CNA record |
References
- https://github.com/jetty/jetty.project/security/advisories/GHSA-85fq-fc5f-7j7g
The CVE record on cve.org NVD's entry
The CVE record is authoritative. Products marked “from the name” were identified from the CNA's free-text names, not a CPE, and are matched less certainly. This product uses the NVD API but is not endorsed or certified by the NVD.