Resource allocation without limits in Eclipse Jetty
Key facts
- Attack vector
- Network
- Privileges required
- None
- User interaction
- None
- Attack complexity
- Low
- Attack requirements
- None
- Impact type
- Denial of service
- Confidentiality · integrity · availability
- None · None · High
- Fix status
- No fix listed
Attack profile from CVSS 4.0 · CNA. Fix status from CNA and Red Hat. Impact type from CWE-770.
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.
Why it matters now
SSVC decision points
CISA ADP · SSVC 2.0.3
- Exploitation
- None
- Automatable
- Yes
- Technical impact
- Partial
The decision (Track, Attend, Act) also depends on your mission and well-being impact; see CISA's SSVC guide.
Affected products
| Vendor | Product | Affected versions | Fixed in | Status | Source |
|---|---|---|---|---|---|
| Eclipse Foundation | Eclipse Jetty | 12.1.0 – 12.1.11; 12.0.0 – 12.0.37; 11.0.0 – 11.0.31; 10.0.0 – 10.0.31 | — | No fix listed | CNA |
- Eclipse Jetty VendorEclipse Foundation Affected 12.1.0 – 12.1.11; 12.0.0 – 12.0.37; 11.0.0 – 11.0.31; 10.0.0 – 10.0.31 Fixed in — No fix listed CNA
Remediation
No fixed version listed by the sources yet.
Vendor assessments
Red Hat
Red Hat rating: Important. Red Hat's page for this CVE →
| Product | Status | Plan or fix |
|---|---|---|
| Red Hat Enterprise Linux 9 | Affected | No fix yet |
| Red Hat Satellite 6 | Affected | No fix yet |
Not affected: 1 product
- Red Hat Fuse 7
Timeline
- 2026-10-02 Threatist record created from CVE-2026-19204
- 2026-10-03 Alias added: GHSA-w753-5ffq-99wr
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Sources
- CVE-2026-19204 · CVE Program
- CVE-2026-19204 · NVD
- FIRST EPSS
- GHSA-w753-5ffq-99wr · GitHub Advisory Database · CC BY 4.0
- CVE-2026-19204 · Red Hat security data · CC BY 4.0
This product uses the NVD API but is not endorsed or certified by the NVD. Sources and licences