# CVE-2026-61387

## Summary

- **CVE ID:** CVE-2026-61387
- **Severity:** MEDIUM
- **CVSS Score:** 6.9 (CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:N/VI:N/VA:L/SC:N/SI:N/SA:N)
- **CWE:** CWE-460, CWE-772, CWE-400
- **Published:** Aug 4, 2026
- **Last Modified:** Aug 4, 2026

## Description

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.

## Affected Products

- Eclipse Foundation — Eclipse Milo (1.0.0)

## References

- [CNA](https://github.com/eclipse-milo/milo/commit/587e35669f519b2d7f6d850a5f86ee5a76c3a2c5)
- [CNA](https://github.com/eclipse-milo/milo/commit/5f3f6da2a5ea80682e1da7c58f7a1870b09d2b43)
- [CNA](https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598)
- [CNA](https://gitlab.eclipse.org/security/cve-assignment/-/work_items/182)

## Exploitation Prediction (EPSS)

- **EPSS Score:** 0.34%
- **EPSS Percentile:** 27.6

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_Exported from OnDuty AI Vulnerability Intelligence on 2026-09-11._