Resource exhaustion in Eclipse Milo
CVE-2026-61387
In Eclipse Milo versions 1.0.0 through 1.1.4, monitored-item quota accounting is not exception-safe: if item creation fails with an unchecked error, the server-global reservation is not restored. Deeply nested PubSub ExtensionObjects in a `CreateMonitoredItems` event filter can trigger a `StackOverflowError` during decoding, allowing an unauthenticated remote client to exhaust a finite global monitored-item quota and prevent all clients from creating new monitored items until restart. Existing monitored items and other server functions remain unaffected.
Vulnerability class: DoS (Denial of Service)
Published · last modified .
CVSS v3 metric
CVSS v3 base score 7.5 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H.
EPSS exploit prediction
EPSS: 0.006 (49.7th percentile), scored .
Very low probability of exploitation in the next 30 days; routine patching cadence is appropriate. 50th percentile — 49.7% of CVEs in the catalogue have a lower EPSS than this one. How to read EPSS.
EPSS over last 30 days · oldest: 0.006 · newest: 0.006 · change: 0.000
Affected products
- Eclipse Milo
- Eclipse Foundation Milo — versions 1.0.0
Weakness classification (CWE)
References
- github.com/eclipse-milo/milo/commit/587e35669f519b2d7f6d850a5f86ee5a76c3a2c5 (Patch)
- github.com/eclipse-milo/milo/commit/5f3f6da2a5ea80682e1da7c58f7a1870b09d2b43 (Patch)
- gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598 (Issue Tracking, Vendor Advisory)
- gitlab.eclipse.org/security/cve-assignment/-/work_items/182 (Broken Link)
Frequently asked questions
- What is CVE-2026-61387?
- CVE-2026-61387 is a high-severity vulnerability in Eclipse Milo, classified under Uncontrolled Resource Consumption. CVSS score: 7.5/10. Published 2026-08-04.
- How severe is CVE-2026-61387?
- High severity. CVSS v3 base score is 7.5 out of 10.