High severity8.8NVD Advisory· Published May 14, 2026· Updated May 18, 2026
CVE-2026-6637
CVE-2026-6637
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.
AI Insight
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Affected products
19- Range: <18.4
- osv-coords17 versionspkg:bitnami/postgresqlpkg:rpm/opensuse/postgresql14&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/postgresql15&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/postgresql16&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/postgresql17&distro=openSUSE%20Leap%2016.0pkg:rpm/opensuse/postgresql17&distro=openSUSE%20Tumbleweedpkg:rpm/opensuse/postgresql18&distro=openSUSE%20Tumbleweedpkg:rpm/suse/postgresql14&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/postgresql14&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/postgresql15&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/postgresql15&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/postgresql16&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/postgresql16&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/postgresql17&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/postgresql17&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0pkg:rpm/suse/postgresql18&distro=SUSE%20Linux%20Enterprise%20Server%2016.0pkg:rpm/suse/postgresql18&distro=SUSE%20Linux%20Enterprise%20Server%20for%20SAP%20applications%2016.0
< 14.23.0+ 16 more
- (no CPE)range: < 14.23.0
- (no CPE)range: < 14.23-1.1
- (no CPE)range: < 15.18-1.1
- (no CPE)range: < 16.14-1.1
- (no CPE)range: < 17.10-160000.1.1
- (no CPE)range: < 17.10-1.1
- (no CPE)range: < 18.4-1.1
- (no CPE)range: < 14.23-160000.1.1
- (no CPE)range: < 14.23-160000.1.1
- (no CPE)range: < 15.18-160000.1.1
- (no CPE)range: < 15.18-160000.1.1
- (no CPE)range: < 16.14-160000.1.1
- (no CPE)range: < 16.14-160000.1.1
- (no CPE)range: < 17.10-160000.1.1
- (no CPE)range: < 17.10-160000.1.1
- (no CPE)range: < 18.4-160000.1.1
- (no CPE)range: < 18.4-160000.1.1
Patches
Vulnerability mechanics
References
1- www.postgresql.org/support/security/CVE-2026-6637/nvdPatchVendor Advisory
News mentions
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