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CVE-2026-120063— psqlODBC stack buffer overflow when quoting long schema and table names

Quick assessment

Affected
PostgreSQL psqlODBC
Exploitation
No confirmed in-the-wild exploitation; assess based on exposure
Recommended action
Check the vendor advisory and references for a fixed version. If immediate upgrade is impossible, restrict exposure and increase monitoring.

当 psqlODBC 将模式名或表名引用并写入一个 128 字节的栈缓冲区时，其长度检查存在缺陷，允许在名称过长时向缓冲区末尾之后多写入两个字节。这些名称来源于应用程序的 SQL 文本：一是驱动程序为描述列而解析的语句中的表名；二是驱动程序重写 时的最后一条 语句的目标表。在 的重写过程中，由服务器发送的列名也可能导致向缓冲区末尾之后多写入一个字节。越界写入的字节分别为双引号（ ）和空字符（ ）。若应用程序将未经信任的 SQL 文本转发给驱动程序，则其进程将面临栈损坏的风险。受影响的版本为 psqlODBC 18.

CVSS 5.9 · Medium

Possible ATT&CK Techniques 1 AI

T1190 · Exploit Public-Facing Application

Affected Version Matrix 1

VendorProduct Version RangeStatus
PostgreSQL psqlODBC < 18.00.0006 affected
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I. Basic Information for CVE-2026-120063

Vulnerability Information
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Vulnerability Title
psqlODBC stack buffer overflow when quoting long schema and table names
Source: CVE Program / CVE List V5
Vulnerability Description
When psqlODBC quotes a schema or table name into a 128-byte stack buffer, its length check lets it write up to two bytes past the end of the buffer for a long name. The names come from the application's SQL text: the table of a statement the driver parses to describe its columns, and the target of the last INSERT when the driver rewrites SELECT @@IDENTITY. In the @@IDENTITY rewrite, a column name sent by the server can also write one byte past the buffer. The bytes written past the buffer are a double quote and a NUL. An application that forwards untrusted SQL text to the driver exposes its process to stack corruption. Versions before psqlODBC 18.00.0006 are affected.
Source: CVE Program / CVE List V5
CVSS Information
CVSS:3.1/AV:N/AC:H/PR:L/UI:N/S:U/C:N/I:L/A:H
Source: CVE Program / CVE List V5
Vulnerability Type
栈缓冲区溢出
Source: CVE Program / CVE List V5

Affected Products

Vendor Product Affected Versions CPE Subscribe
PostgreSQL psqlODBC 0 ~ 18.00.0006 -

II. Public POCs for CVE-2026-120063

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III. Intelligence Information for CVE-2026-120063

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Other References for CVE-2026-120063 (1)

Same Patch Batch · PostgreSQL · 2026-11-02 · 11 CVEs total

CVE-2026-120062 7.5 HIGH psqlODBC SQL injection through SQLSpecialColumns table and schema names
CVE-2026-120061 7.5 HIGH psqlODBC ODBC escape parser stack buffer overflow
CVE-2026-120058 7.5 HIGH psqlODBC row cache overflow when a later FETCH changes the column count
CVE-2026-120057 7.5 HIGH psqlODBC large-object read overflows the application buffer
CVE-2026-120064 7.5 HIGH psqlODBC does not validate column numbers and row indexes in binding and descriptor functi
CVE-2026-120065 7.1 HIGH psqlODBC does not escape a server-supplied column name in its updatable-cursor queries
CVE-2026-120059 6.8 MEDIUM psqlODBC uses a server-supplied column name as a format string
CVE-2026-120060 5.9 MEDIUM psqlODBC does not validate server-supplied counts and lengths
CVE-2026-120067 5.9 MEDIUM psqlODBC stack buffer overflow copying ctid and oid values for updatable cursors
CVE-2026-120066 5.3 MEDIUM psqlODBC log files are created with default permissions at a predictable path and follow s

IV. Related Vulnerabilities

Same product: psqlODBC
Same vendor: PostgreSQL
Same weakness: CWE-121