CVE-2026-120057
psqlODBC large-object read overflows the application buffer
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
psqlODBC copies the reply to a large-object read (loread) into the application's buffer using the length sent by the server, without comparing it to the buffer size. A server not trusted under current SSL settings, or a man-in-the-middle, can return more bytes than the buffer holds and overwrite adjacent memory in the client process with server-chosen bytes. Fetching any large-object column is sufficient to trigger it. Versions before psqlODBC 18.00.0006 are affected.
| CWE | CWE-120 |
| Vendor | postgresql |
| Product | psqlodbc |
| Ecosystems | |
| Industries | Technology |
| Published | Nov 2, 2026 |
| Last Updated | Nov 2, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H Attack Vector
Network
Attack Complexity
High
Privileges Required
None
User Interaction
Required
Scope
Unchanged
Confidentiality
High
Integrity
High
Availability
High
Affected Versions
PostgreSQL / psqlODBC
0 < 18.00.0006