{"id":"CVE-2026-103223","published":"2026-10-15T09:17:15.853","lastModified":"2026-10-15T15:17:20.400","description":"In Eclipse Vert.x versions [4.0.0, 4.5.34] or [5.0.0,5.0.12] or [5.1.0,5.1.9] or [5.2.0, 5.2.0], the PostgreSQL message decoder reads the 4-byte message length field from the PostgreSQL wire protocol without any maximum validation. A malicious, compromised, or man-in-the-middle PostgreSQL server can send a message header with the length field set to an extremely large value (up to Integer.MAX_VALUE), causing the decoder to accumulate subsequent TCP data into a composite buffer without bound, leading to unbounded memory allocation on the client and an out-of-memory crash. This occurs before authentication completes.\n\n\n\nThe impacted component is io.vertx:vertx-pg-client.","cvssScore":null,"cvssSeverity":null,"cvssVector":null,"cwes":["CWE-789"],"vendors":[],"products":[],"references":[{"url":"https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-hm2j-xp3c-jff2","tags":[]},{"url":"https://gitlab.eclipse.org/security/cve-assignment/-/work_items/354","tags":[]}],"exploitRefs":[{"url":"https://github.com/eclipse-vertx/vertx-sql-client/security/advisories/GHSA-hm2j-xp3c-jff2","tags":[]}],"hasPoc":true,"ai":null}