Memory leak in Eclipse Milo
Priority MEDIUM 44CWE-401Published · Updated
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. Impact type from CWE-401.
Summary
In Eclipse Milo versions 0.6.0 through 1.1.4, UASC server transport handlers fail to release retained partial message chunks when a channel disconnects, allowing a remote unauthenticated client to exhaust pooled direct memory by repeatedly sending incomplete chunks and disconnecting, potentially terminating the server.
Why it matters now
Exploitation None reported CISA SSVC · not in CISA KEV
EPSS 0.00583 48th percentileScored 2026-11-07
Fix No fix listed No fixed version in the sources yet
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 Milo | 0.6.0 – 1.1.4 | — | No fix listed | CNA |
- Eclipse Milo VendorEclipse Foundation Affected 0.6.0 – 1.1.4 Fixed in — No fix listed CNA
CPE configurations NVD · 1
| CPE | Versions | Role | Vendor |
|---|---|---|---|
| cpe:2.3:a:eclipse:milo:*:*:*:*:*:*:*:* | 0.6.0 to before 1.1.5 | Vulnerable | Eclipse Foundation |
- cpe:2.3:a:eclipse:milo:*:*:*:*:*:*:*:* Versions 0.6.0 to before 1.1.5 Vulnerable ·Eclipse Foundation
Remediation
No fixed version listed by the sources yet.
Timeline
- 2026-10-02 Threatist record created from CVE-2026-63252
- 2026-10-03 Alias added: GHSA-8mrr-fgjx-37mf
References
More Eclipse Foundation Milo vulnerabilities
- TI-2026-44975 Incorrect authorization in Eclipse Milo CVSS 4.0HIGH 8.7
- TI-2026-41830 Missing authorization in Eclipse Milo CVSS 4.0HIGH 8.8
- TI-2026-42787 In Eclipse Milo versions 0.6.0 through 1.1.4, username-token processing returns… CVSS 4.0CRITICAL 9.1
- TI-2026-44014 Uncontrolled resource consumption in Eclipse Milo CVSS 4.0MEDIUM 6.9
- TI-2026-45120 Missing authorization in Eclipse Milo CVSS 4.0MEDIUM 6.9
- TI-2022-09453 Denial of service (DoS) in org.eclipse.milo:sdk-server CVSS 3.1HIGH 7.5
Sources
- CVE-2026-63252 · CVE Program
- CVE-2026-63252 · NVD
- FIRST EPSS
- GHSA-8mrr-fgjx-37mf · GitHub Advisory Database · CC BY 4.0
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