CVE-2026-61387
MEDIUM 6.9 ALL-YEARSIn 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.
No known exploitation, public exploit, or elevated probability at this time. Track for changes.
Exploitation likelihood
0.6%chance of exploitation in 30 days · 49th percentile
Impact if exploited
6.9CVSS 4.0 · MEDIUM · CNA
- ConfidentialityNone
- IntegrityNone
- AvailabilityLow
What an attacker needs
- ✓Access: Reachable over the network — no local access needed
- ✓Privileges: No account or privileges required
- ✓User interaction: No user interaction needed
- ✓Complexity: No special conditions — reliably repeatable
- ✓Requirements: No special attack requirements
✓ lowers the bar for an attacker · ⚠ raises it
Proof of concept
No public PoC is currently catalogued.
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Tracked sources are checked weekly for the full archive, including PoCs published after the original disclosure. A later release appears after a tracked source lists it and a refresh succeeds.
Weakness (CWE)
- CWE-460: Improper Cleanup on Thrown Exception
- CWE-772: Missing Release of Resource after Effective Lifetime
- CWE-400: Uncontrolled resource consumption
CVSS vector
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
References and research data (JSON)
Known Affected Software Configurations
| Vendor | Product | Version range |
|---|---|---|
| Eclipse | Milo | ≥ 1.0.0 and < 1.1.5 |
All CVSS metrics
- MEDIUM 6.9 v4.0 · CNA Primary
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 - MEDIUM 6.9 v4.0 · NVD Secondary
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/E:X/CR:X/IR:X/AR:X/MAV:X/MAC:X/MAT:X/MPR:X/MUI:X/MVC:X/MVI:X/MVA:X/MSC:X/MSI:X/MSA:X/S:X/AU:X/R:X/V:X/RE:X/U:X - HIGH 7.5 v3.1 · NVD Primary
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H
References
Patches & mitigations
- https://github.com/eclipse-milo/milo/commit/587e35669f519b2d7f6d850a5f86ee5a76c3a2c5 CVE record · eclipse · Updated 2026-08-04T12:00:25.508Z
NVD · CVE-2026-61387 · Updated 2026-10-23T23:10:00.157 - https://github.com/eclipse-milo/milo/commit/5f3f6da2a5ea80682e1da7c58f7a1870b09d2b43 CVE record · eclipse · Updated 2026-08-04T12:00:25.508Z
NVD · CVE-2026-61387 · Updated 2026-10-23T23:10:00.157
Advisories
- https://gitlab.eclipse.org/security/vulnerability-reports/-/work_items/598 CVE record · eclipse · Updated 2026-08-04T12:00:25.508Z
NVD · CVE-2026-61387 · Updated 2026-10-23T23:10:00.157 - https://euvd.enisa.europa.eu/vulnerability/EUVD-2026-52659 EUVD · EUVD-2026-52659
Technical & other
- https://gitlab.eclipse.org/security/cve-assignment/-/work_items/182 CVE record · eclipse · Updated 2026-08-04T12:00:25.508Z
NVD · CVE-2026-61387 · Updated 2026-10-23T23:10:00.157
Sources: NVD · CVE.org · All sources and attribution · EPSS