psqlODBC sizes its row cache from the column count of a cursor's first result, but recomputes the column count from each later FETCH reply without checking that it matches. A server not trusted under current SSL settings can answer a later FETCH with more columns and make the driver write tuple records past the end of the heap allocation. A keyset reply with fewer columns than the key fields also underflows the unsigned field count. This is reachable with UseDeclareFetch enabled. Versions before psqlODBC 18.00.0006 are affected.
History

Mon, 02 Nov 2026 21:00:00 +0000

Type Values Removed Values Added
First Time appeared Postgresql
Postgresql psqlodbc
Vendors & Products Postgresql
Postgresql psqlodbc

Mon, 02 Nov 2026 20:30:00 +0000

Type Values Removed Values Added
Metrics ssvc

{'options': {'Automatable': 'no', 'Exploitation': 'none', 'Technical Impact': 'total'}, 'version': '2.0.3'}


Mon, 02 Nov 2026 19:15:00 +0000

Type Values Removed Values Added
Description psqlODBC sizes its row cache from the column count of a cursor's first result, but recomputes the column count from each later FETCH reply without checking that it matches. A server not trusted under current SSL settings can answer a later FETCH with more columns and make the driver write tuple records past the end of the heap allocation. A keyset reply with fewer columns than the key fields also underflows the unsigned field count. This is reachable with UseDeclareFetch enabled. Versions before psqlODBC 18.00.0006 are affected.
Title psqlODBC row cache overflow when a later FETCH changes the column count
Weaknesses CWE-191
CWE-787
References
Metrics cvssV3_1

{'score': 7.5, 'vector': 'CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H'}


cve-icon MITRE

Status: PUBLISHED

Assigner: PostgreSQL

Published: 2026-11-02T19:09:09.747Z

Updated: 2026-11-02T19:33:49.913Z

Reserved: 2026-10-30T19:25:18.919Z

Link: CVE-2026-120058

cve-icon Vulnrichment

Updated: 2026-11-02T19:33:44.708Z

cve-icon NVD

Status : Awaiting Analysis

Published: 2026-11-02T19:18:02.857

Modified: 2026-11-02T20:17:38.920

Link: CVE-2026-120058

cve-icon Redhat

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