CVE-2026-103223 (GCVE-0-2026-103223)

Vulnerability from cvelistv5 – Published: 2026-10-15 08:20 – Updated: 2026-10-15 14:26
VLAI
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.
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
SSVC
Exploitation: none Automatable: no Technical Impact: partial
CISA Coordinator · CISA-ADP (v2.0.3)
Decision recorded 2026-10-15 14:26 UTC
CWE
  • CWE-789 - Memory Allocation with Excessive Size Value
Assigner
eclipse CNA under the mitre root
CNA scorecard C 63/100 over 146 records in the last 180 days details
References
Impacted products
Vendor Product Version CPE status
Eclipse Foundation Eclipse Vert.x Affected: 4.0.0 , ≤ 4.5.34 (semver)
Affected: 5.0.0 , ≤ 5.0.12 (semver)
Affected: 5.1.0 , ≤ 5.1.9 (semver)
Affected: 5.2.0 (semver)
guessed Create a notification for this product.
Credits
Thomas Segismont
Show details on NVD website
To clipboard 

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