CVE-2026-61387: CWE-460 in Eclipse Foundation Eclipse Milo
Eclipse Milo versions 1.0.0 through 1.1.4 contain a vulnerability where monitored-item quota accounting is not exception-safe. An unauthenticated remote client can trigger a StackOverflowError by sending deeply nested PubSub ExtensionObjects in a CreateMonitoredItems event filter. This causes the server-global monitored-item quota to be exhausted and prevents new monitored items from being created until the server is restarted. Existing monitored items and other server functions remain unaffected.
AI Analysis
Technical Summary
In Eclipse Milo versions 1.0.0 through 1.1.4, the monitored-item quota accounting mechanism is not exception-safe. If item creation fails due to an unchecked error such as a StackOverflowError triggered by deeply nested PubSub ExtensionObjects in a CreateMonitoredItems event filter, the server-global reservation for monitored items is not restored. This allows an unauthenticated remote attacker to exhaust the finite global monitored-item quota, effectively blocking all clients from creating new monitored items until the server is restarted. The vulnerability is related to improper resource management (CWE-460), uncontrolled resource consumption (CWE-400), and missing release of resource after effective lifetime (CWE-772).
Potential Impact
An unauthenticated remote attacker can cause denial of service by exhausting the global monitored-item quota on the server. This prevents all clients from creating new monitored items until the server is restarted. However, existing monitored items and other server functions are not affected by this condition.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting access to the CreateMonitoredItems service or monitoring for unusual usage patterns that may trigger quota exhaustion. Restarting the server restores the quota but is a temporary workaround.
CVE-2026-61387: CWE-460 in Eclipse Foundation Eclipse Milo
Description
Eclipse Milo versions 1.0.0 through 1.1.4 contain a vulnerability where monitored-item quota accounting is not exception-safe. An unauthenticated remote client can trigger a StackOverflowError by sending deeply nested PubSub ExtensionObjects in a CreateMonitoredItems event filter. This causes the server-global monitored-item quota to be exhausted and prevents new monitored items from being created until the server is restarted. Existing monitored items and other server functions remain unaffected.
CVSS v4.0
Score 6.9medium
Affected software
Eclipse Foundation
Eclipse Milo
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AI-Powered Analysis
Machine-generated threat intelligence
Technical Analysis
In Eclipse Milo versions 1.0.0 through 1.1.4, the monitored-item quota accounting mechanism is not exception-safe. If item creation fails due to an unchecked error such as a StackOverflowError triggered by deeply nested PubSub ExtensionObjects in a CreateMonitoredItems event filter, the server-global reservation for monitored items is not restored. This allows an unauthenticated remote attacker to exhaust the finite global monitored-item quota, effectively blocking all clients from creating new monitored items until the server is restarted. The vulnerability is related to improper resource management (CWE-460), uncontrolled resource consumption (CWE-400), and missing release of resource after effective lifetime (CWE-772).
Potential Impact
An unauthenticated remote attacker can cause denial of service by exhausting the global monitored-item quota on the server. This prevents all clients from creating new monitored items until the server is restarted. However, existing monitored items and other server functions are not affected by this condition.
Mitigation Recommendations
Patch status is not yet confirmed — check the vendor advisory for current remediation guidance. Until a fix is available, consider restricting access to the CreateMonitoredItems service or monitoring for unusual usage patterns that may trigger quota exhaustion. Restarting the server restores the quota but is a temporary workaround.
Technical Details
- Data Version
- 5.2
- Assigner Short Name
- eclipse
- Date Reserved
- 2026-07-16T13:58:02.242Z
- Cvss Version
- 4.0
- State
- PUBLISHED
Threat ID: 6a71dc0fa76b74ea483f8867
Added to database: 08/04/2026, 12:33:19 UTC
Last enriched: 08/11/2026, 18:29:07 UTC
Last updated: 09/17/2026, 22:01:37 UTC
Views: 65
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