CVE-2025-53114
High
Description
CometD is a scalable comet implementation for web messaging. In versions 5.0.0 through 5.0.22, 6.0.0 through 6.0.18, 7.0.0 through 7.0.18, and 8.0.0 through 8.0.8, bad clients that always send a fixed batch value when the server is using the acknowledgement extension may cause the unacknowledged message queue to grow indefinitely, eventually causing an `OutOfMemoryError`. Versions 5.0.23, 6.0.19, 7.0.19, and 8.0.9 patch the issue. As a workaround, disable the acknowledgement extension.
SeverityHigh
CVSS7.5
Exploit probability—
ProductOrg.cometd.java:cometd-java-server-common
PublishedJun 18, 2026
First seenJun 18, 2026
Weakness typeCWE-400Uncontrolled resource consumption
How to fix
Update
- org.cometd.java:cometd-java-server-common5.0.23, 6.0.19, 7.0.19, 8.0.9 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| org.cometd.java:cometd-java-server-commonMaven | 5.0.0 ≤ v < 5.0.23, 6.0.0 ≤ v < 6.0.19, 7.0.0 ≤ v < 7.0.19, 8.0.0 ≤ v < 8.0.9 | 5.0.23, 6.0.19, 7.0.19, 8.0.9 |
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