{"id":"CVE-2025-53114","aliases":["GHSA-cqgj-h8vf-4w59"],"url":"https://o3.security/vulnerability/CVE-2025-53114","summary":"CometD has acknowledgement extension out of memory","details":"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.","published":"2026-06-18T16:25:47.388Z","modified":"2026-08-12T03:51:20.800088047Z","cvss":{"score":7.5,"severity":"HIGH","vector":"CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H"},"epss":{"score":0.00684,"percentile":0.49329,"asOf":"2026-08-12"},"cisaKev":null,"exploitsKnown":0,"affectedPackages":[{"ecosystem":"Maven","name":"org.cometd.java:cometd-java-server-common","fixedVersion":"5.0.23"},{"ecosystem":"Maven","name":"org.cometd.java:cometd-java-server-common","fixedVersion":"6.0.19"},{"ecosystem":"Maven","name":"org.cometd.java:cometd-java-server-common","fixedVersion":"7.0.19"},{"ecosystem":"Maven","name":"org.cometd.java:cometd-java-server-common","fixedVersion":"8.0.9"}],"fix":{"url":"https://github.com/cometd/cometd/pull/2118","label":"cometd/cometd#2118"},"references":[{"type":"WEB","url":"https://github.com/cometd/cometd/discussions/2116"},{"type":"ADVISORY","url":"https://github.com/CVEProject/cvelistV5/tree/main/cves/2025/53xxx/CVE-2025-53114.json"},{"type":"ADVISORY","url":"https://github.com/cometd/cometd/security/advisories/GHSA-cqgj-h8vf-4w59"},{"type":"ADVISORY","url":"https://nvd.nist.gov/vuln/detail/CVE-2025-53114"},{"type":"REPORT","url":"https://github.com/cometd/cometd/issues/2117"},{"type":"FIX","url":"https://github.com/cometd/cometd/pull/2118"},{"type":"FIX","url":"https://github.com/cometd/cometd/pull/2168"},{"type":"FIX","url":"https://github.com/cometd/cometd/pull/2169"}],"provenance":{"sources":["OSV.dev","FIRST.org (EPSS)"],"lastVerified":"2026-08-12T03:51:20.800088047Z"}}