High, CVSS 7.5MavenPublished
Acknowledgement extension out of memory
CVE-2025-53114 · GHSA-cqgj-h8vf-4w59
- Affected
- Maven org.cometd.java:cometd-java-server-common >= 5.0.0, <= 5.0.22; >= 6.0.0, <= 6.0.18; >= 7.0.0, <= 7.0.18; >= 8.0.0, <= 8.0.8
- Fixed in
- 5.0.236.0.198.0.97.0.19· Vendor fix available
- Issue
- Impact Bad clients that always send a fixed batch value while the server is using the acknowledgement extension can cause the unacknowledged message queue to grow indefinitely, eventually resulting in an OutOfMemoryError. Such bad clients would always send: The server would never clear the unacknowledged message queue, and one bad client can cause a server outage. Patches 5.0.x - https://github.com/cometd/cometd/pull/2168 6.0.x - https://github.com/cometd/cometd/pull/2169 8.0.x - https://github.com/cometd/cometd/pull/2118 Workarounds Disable the acknowledgement extension. Resources https://github.com/cometd/cometd/discussions/2116 https://github.com/cometd/cometd/issues/2117
Recommended action: Upgrade to 8.0.9, 7.0.19, 6.0.19 or 5.0.23 by release line, then redeploy and verify.A vendor fix does not resolve your finding until you verify it in your own systems.