Skip to content
fr Sign in
8.8 High

CVE-2026-6637 Stack buffer overflow in PostgreSQL module "refint" allows an unprivileged database user to execute arbitrary code as…

Description

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 and versions

Product Affected versions Fixed in
postgresql 18 18 → < 18.4 18.4
postgresql 17 17 → < 17.10 17.10
postgresql 16 16 → < 16.14 16.14
postgresql 15 15 → < 15.18 15.18
postgresql 14.23 earliest → < 14.23 14.23

References

Timeline

  1. Published
  2. Last modified

Other CVEs of postgresql

The 79 CVEs of postgresql →
CVE-2026-6471 Missing authorization in PostgreSQL logical decoding allows a non-superuser holding REPLICATION privilege to dlopen… 7.2 High CVE-2026-14671 Type confusion in PostgreSQL module "refint" allows an object creator to execute arbitrary code as the operating… 8.8 High CVE-2026-6470 Missing authorization in PostgreSQL DDL commands allows an object creator to achieve denial of service against ALTER and… 4.3 Medium CVE-2026-6464 Untrusted data inclusion in PostgreSQL psql COPY may allow a server administrator to elicit execution of data lines as… 8.1 High
Track this CVE