Vulnerability · Published Nov 2, 2026 · Assigned by PostgreSQL
CVE-2026-120058psqlODBC row cache overflow when a later FETCH changes the column count
High 7.5
In plain English
A high-severity out-of-bounds write in psqlODBC from PostgreSQL. There are no confirmed reports of exploitation so far. The chance it is exploited in the next 30 days is estimated at 0.3% (higher than 17% of all known vulnerabilities). Fixed versions are available - upgrade the affected package.
Official 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.
Affected packages & fixed versions
| Ecosystem | Package | Fixed in | Advisory |
|---|---|---|---|
| Debian:12 | psqlodbc | no fix listed | DEBIAN-CVE-2026-120058 |
| Debian:13 | psqlodbc | no fix listed | DEBIAN-CVE-2026-120058 |
| Debian:14 | psqlodbc | 1:18.00.0006-1 | DEBIAN-CVE-2026-120058 |
| Ubuntu:22.04:LTS | psqlodbc | no fix listed | UBUNTU-CVE-2026-120058 |
| Ubuntu:24.04:LTS | psqlodbc | no fix listed | UBUNTU-CVE-2026-120058 |
| Ubuntu:26.04:LTS | psqlodbc | no fix listed | UBUNTU-CVE-2026-120058 |
| Ubuntu:26.10 | psqlodbc | no fix listed | UBUNTU-CVE-2026-120058 |
Affected products (as reported)
| Vendor | Product | Versions |
|---|---|---|
| PostgreSQL | psqlODBC | 0 – before 18.00.0006 |
Weakness: CWE-787, CWE-191 · Vector: CVSS:3.1/AV:N/AC:H/PR:N/UI:R/S:U/C:H/I:H/A:H