CVE-2026-103223 (GCVE-0-2026-103223)
Vulnerability from cvelistv5
Published
2026-10-15 08:20
Modified
2026-10-15 14:26
Severity ?
8.2 (High) - CVSS:4.0/AV:N/AC:H/AT:N/PR:N/UI:N/VC:N/VI:N/VA:H/SC:N/SI:N/SA:N
Summary
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. The impacted component is io.vertx:vertx-pg-client.
References
Impacted products
Vendor Product Version
Eclipse Foundation Eclipse Vert.x Version: 4.0.0   ≤ 4.5.34
Version: 5.0.0   ≤ 5.0.12
Version: 5.1.0   ≤ 5.1.9
Version: 5.2.0   ≤
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