CVE-2026-61387: eclipse foundation eclipse milo Uncontrolled Resource Consumption

Vulnerability summary

CVE-2026-61387 is a high (CVSS 7.5) Uncontrolled Resource Consumption vulnerability in eclipse foundation eclipse milo. EPSS estimates a 0.62% chance of exploitation in the next 30 days, higher than 48.6% of scored vulnerabilities.

Timeline

1. 04-08-2026
   PublishedVulnerability first disclosed.
2. 04-08-2026
   Last modifiedVulnerability information updated.

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.

• CWE-400Uncontrolled Resource ConsumptionThe product does not properly control the allocation and maintenance of a limited resource.
• CWE-460Improper Cleanup on Thrown ExceptionThe product does not clean up its state or incorrectly cleans up its state when an exception is thrown, leading to unexpected state or control flow.
• CWE-772Missing Release of Resource after Effective LifetimeThe product does not release a resource after its effective lifetime has ended, i.e., after the resource is no longer needed.