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 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.
- Score
- CVSS 3.1 8.8 High
- Status
- Analyzed - f86ef6dc-4d3a-42ad-8f28-e6d5547a5007
- Published
- 2026-05-14
- Last modified
- 2026-05-15
- Weaknesses
- CWE-121, CWE-89
Affected products
References
- https://www.postgresql.org/support/security/CVE-2026-6637/
