high8.8
CVE-2026-6637
Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the dat…
Impact
Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as the operating system user running the database. A distinct attack is possible if the application declares a user-controlled column as a "refint" cascade primary key and facilitates user-controlled updates to that column. In that case, a SQL injection allows a primary key update value provider to execute arbitrary SQL as the database user performing the primary key update. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
Affected products
| Vendor | Product | Affected versions |
|---|---|---|
| Postgresql | Postgresql | before 14.23 from 15.0 before 15.18 from 16.0 before 16.14 from 17.0 before 17.10 from 18.0 before 18.4 |