CVE-2026-120063 psqlODBC stack buffer overflow when quoting long schema and table names
- Exploited in the wild
- Not known
- Fix
- Available
What is CVE-2026-120063?
CVE-2026-120063 is a medium-severity vulnerability in PostgreSQL psqlODBC, published on 2 Nov 2026.
Official 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.
Which versions are affected by CVE-2026-120063?
How do I fix CVE-2026-120063?
Upgrade to a fixed version.
Is CVE-2026-120063 being exploited?
There is no known exploitation of CVE-2026-120063 in the wild and no public exploit code.
Sources
Also known as DEBIAN-CVE-2026-120063, GHSA-285r-84w3-xcxv, GHSA-5xmp-p3qm-7hxq, UBUNTU-CVE-2026-120063.