CVE-2025-53114High· 7.5▾ TwilightCometD 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…
▾ Twilight zone — High severity, or a signal on a lesser flaw
impact 41.3 · likelihood 0.1 · exploitation 0
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Exploit-prediction probability, daily snapshots since Aug 3.
Disclosure to exploitation, from the record and what we observed since indexing it.
Disclosed via NVD
0.7%
Last analysed / modified upstream
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.
Refer to the linked advisories for vendor-supplied fixes and affected version ranges.
Affected packages:
org.cometd.java:cometd-java-server-common >= 5.0.0, <= 5.0.22org.cometd.java:cometd-java-server-common >= 6.0.0, <= 6.0.18org.cometd.java:cometd-java-server-common >= 7.0.0, <= 7.0.18org.cometd.java:cometd-java-server-common >= 8.0.0, <= 8.0.8Patched in:
org.cometd.java:cometd-java-server-common 5.0.23org.cometd.java:cometd-java-server-common 6.0.19org.cometd.java:cometd-java-server-common 7.0.19org.cometd.java:cometd-java-server-common 8.0.9Connected by shared product, vendor, weakness, or advisory.
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