SQL injection in PostgreSQL - CVE-2026-6638

Vulnerability identifier: #VU131464

CSH Severity: Low

CVSS v4: 2 [CVSS:4.0/AV:N/AC:L/AT:P/PR:L/UI:A/VC:L/VI:L/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-6638

CWE-ID: CWE-89

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote user to execute arbitrary SQL with the subscription's publication-side credentials.

The vulnerability exists due to SQL injection in ALTER SUBSCRIPTION ... REFRESH PUBLICATION when processing a table name. A remote user can create a crafted subscriber table name to execute arbitrary SQL with the subscription's publication-side credentials.

User interaction is required for the next REFRESH PUBLICATION to occur.

PostgreSQL
SUSE Linux Enterprise Server 15 SP5
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
Debian Linux
SUSE Linux Enterprise Server 15 SP6
Gentoo Linux
SUSE Linux Enterprise Server for SAP Applications 15
SUSE Linux Enterprise High Performance Computing LTSS 15
SUSE Linux Enterprise Server 15
SUSE Linux Enterprise High Performance Computing ESPOS 15
SUSE Linux Enterprise High Performance Computing 15
SUSE Linux Enterprise High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Desktop 15
SUSE Linux Enterprise Real Time 15
Basesystem Module
SUSE Package Hub 15
Server Applications Module
Legacy Module
openSUSE Leap
Ubuntu
openEuler
SecurityCenter
dev-db/postgresql
postgresql-14 (Ubuntu package)
postgresql16-pltcl-debuginfo
postgresql16-plpython
postgresql16-debuginfo
postgresql16-server-debuginfo
postgresql16-debugsource
postgresql16-plperl-debuginfo
postgresql16-server-devel
postgresql16-server
postgresql16-contrib-debuginfo
postgresql16-docs
postgresql16-contrib
postgresql16-server-devel-debuginfo
postgresql16-devel
postgresql16-devel-debuginfo
postgresql16-plpython-debuginfo
postgresql16
postgresql16-pltcl
postgresql16-plperl
postgresql16-llvmjit-debuginfo
postgresql16-llvmjit-devel
postgresql16-test
postgresql16-llvmjit
postgresql-17 (Debian package)
postgresql-17-private-libs
postgresql-17-upgrade-devel
postgresql-17-server
postgresql-17-server-devel
postgresql-17-static
postgresql-17-test
postgresql-17-upgrade
postgresql-17-test-rpm-macros
postgresql-17-private-devel
postgresql-17-pltcl
postgresql-17-plpython3
postgresql-17-plperl
postgresql-17-docs
postgresql-17-debugsource
postgresql-17
postgresql-17-contrib
postgresql-17-debuginfo
postgresql17-server-devel-debuginfo
postgresql17-server-debuginfo
postgresql17-contrib
postgresql17-server-devel
postgresql17-devel-debuginfo
postgresql17-llvmjit
postgresql17-plperl
postgresql17
postgresql17-contrib-debuginfo
postgresql17-debuginfo
postgresql17-pltcl
postgresql17-pltcl-debuginfo
postgresql17-debugsource
postgresql17-plpython
postgresql17-devel
postgresql17-llvmjit-devel
postgresql17-plpython-debuginfo
postgresql17-plperl-debuginfo
postgresql17-server
postgresql17-docs
postgresql17-test
postgresql17-llvmjit-debuginfo
libecpg6-debuginfo-32bit
libpq5-32bit
libecpg6-32bit
libpq5-debuginfo-32bit
libecpg6
libpq5-debuginfo
libpq5
libecpg6-debuginfo
libpq5-32bit-debuginfo
postgresql18-debuginfo
postgresql18-debugsource
postgresql18-devel-mini
postgresql18-plpython-debuginfo
postgresql18-pltcl-debuginfo
postgresql18-server
postgresql18-server-devel-debuginfo
libpq5-64bit-debuginfo
postgresql18-llvmjit-debuginfo
libecpg6-32bit-debuginfo
postgresql18-docs
libecpg6-64bit
libecpg6-64bit-debuginfo
postgresql18-mini-debugsource
postgresql18-pltcl
postgresql18
postgresql18-devel-mini-debuginfo
postgresql18-plpython
postgresql18-llvmjit
postgresql18-server-devel
postgresql18-contrib-debuginfo
postgresql18-devel-debuginfo
postgresql18-plperl
libpq5-64bit
postgresql18-llvmjit-devel
postgresql18-devel
postgresql18-contrib
postgresql18-test
postgresql18-plperl-debuginfo
postgresql18-server-debuginfo

Install security update from vendor's website.

PostgreSQL - addressed in versions 16.14, 17.10, 18.4
SecurityCenter - addressed in versions SC202607.1, SC202607.2
dev-db/postgresql - update to 9.0.5
postgresql-14 (Ubuntu package) - addressed in versions 14.23-0ubuntu0.22.04.1, 16.14-0ubuntu0.24.04.1, 17.10-0ubuntu0.25.10.1, 18.4-0ubuntu0.26.04.1
postgresql16-pltcl-debuginfo - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-plpython - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-debuginfo - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-server-debuginfo - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-debugsource - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-plperl-debuginfo - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-server-devel - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-server - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-contrib-debuginfo - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-docs - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-contrib - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-server-devel-debuginfo - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-devel - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-devel-debuginfo - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-plpython-debuginfo - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16 - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-pltcl - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-plperl - addressed in versions 16.14-3.44.1, 16.14-150200.5.44.1, 16.14-150600.16.33.1
postgresql16-llvmjit-debuginfo - update to 16.14-150600.16.33.1
postgresql16-llvmjit-devel - update to 16.14-150600.16.33.1
postgresql16-test - update to 16.14-150600.16.33.1
postgresql16-llvmjit - update to 16.14-150600.16.33.1
postgresql-17 (Debian package) - update to 17.10-0+deb13u1
postgresql-17-private-libs - update to 17.10-1
postgresql-17-upgrade-devel - update to 17.10-1
postgresql-17-server - update to 17.10-1
postgresql-17-server-devel - update to 17.10-1
postgresql-17-static - update to 17.10-1
postgresql-17-test - update to 17.10-1
postgresql-17-upgrade - update to 17.10-1
postgresql-17-test-rpm-macros - update to 17.10-1
postgresql-17-private-devel - update to 17.10-1
postgresql-17-pltcl - update to 17.10-1
postgresql-17-plpython3 - update to 17.10-1
postgresql-17-plperl - update to 17.10-1
postgresql-17-docs - update to 17.10-1
postgresql-17-debugsource - update to 17.10-1
postgresql-17 - update to 17.10-1
postgresql-17-contrib - update to 17.10-1
postgresql-17-debuginfo - update to 17.10-1
postgresql17-server-devel-debuginfo - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-server-debuginfo - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-contrib - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-server-devel - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-devel-debuginfo - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-llvmjit - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-plperl - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17 - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-contrib-debuginfo - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-debuginfo - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-pltcl - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-pltcl-debuginfo - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-debugsource - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-plpython - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-devel - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-llvmjit-devel - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-plpython-debuginfo - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-plperl-debuginfo - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-server - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-docs - addressed in versions 17.10-150200.5.28.1, 17.10-150600.13.27.1
postgresql17-test - update to 17.10-150600.13.27.1
postgresql17-llvmjit-debuginfo - update to 17.10-150600.13.27.1
libecpg6-debuginfo-32bit - update to 18.4-8.12.1
libpq5-32bit - addressed in versions 18.4-8.12.1, 18.4-150200.5.12.1, 18.4-150600.13.11.1
libecpg6-32bit - addressed in versions 18.4-8.12.1, 18.4-150600.13.11.1
libpq5-debuginfo-32bit - update to 18.4-8.12.1
libecpg6 - addressed in versions 18.4-8.12.1, 18.4-150200.5.12.1, 18.4-150600.13.11.1
libpq5-debuginfo - addressed in versions 18.4-8.12.1, 18.4-150200.5.12.1, 18.4-150600.13.11.1
libpq5 - addressed in versions 18.4-8.12.1, 18.4-150200.5.12.1, 18.4-150600.13.11.1
libecpg6-debuginfo - addressed in versions 18.4-8.12.1, 18.4-150200.5.12.1, 18.4-150600.13.11.1
libpq5-32bit-debuginfo - addressed in versions 18.4-150200.5.12.1, 18.4-150600.13.11.1
postgresql18-debuginfo - addressed in versions 18.4-150200.5.12.1, 18.4-150600.13.11.1
postgresql18-debugsource - addressed in versions 18.4-150200.5.12.1, 18.4-150600.13.11.1
postgresql18-devel-mini - update to 18.4-150600.13.11.1
postgresql18-plpython-debuginfo - update to 18.4-150600.13.11.1
postgresql18-pltcl-debuginfo - update to 18.4-150600.13.11.1
postgresql18-server - update to 18.4-150600.13.11.1
postgresql18-server-devel-debuginfo - update to 18.4-150600.13.11.1
libpq5-64bit-debuginfo - update to 18.4-150600.13.11.1
postgresql18-llvmjit-debuginfo - update to 18.4-150600.13.11.1
libecpg6-32bit-debuginfo - update to 18.4-150600.13.11.1
postgresql18-docs - update to 18.4-150600.13.11.1
libecpg6-64bit - update to 18.4-150600.13.11.1
libecpg6-64bit-debuginfo - update to 18.4-150600.13.11.1
postgresql18-mini-debugsource - update to 18.4-150600.13.11.1
postgresql18-pltcl - update to 18.4-150600.13.11.1
postgresql18 - update to 18.4-150600.13.11.1
postgresql18-devel-mini-debuginfo - update to 18.4-150600.13.11.1
postgresql18-plpython - update to 18.4-150600.13.11.1
postgresql18-llvmjit - update to 18.4-150600.13.11.1
postgresql18-server-devel - update to 18.4-150600.13.11.1
postgresql18-contrib-debuginfo - update to 18.4-150600.13.11.1
postgresql18-devel-debuginfo - update to 18.4-150600.13.11.1
postgresql18-plperl - update to 18.4-150600.13.11.1
libpq5-64bit - update to 18.4-150600.13.11.1
postgresql18-llvmjit-devel - update to 18.4-150600.13.11.1
postgresql18-devel - update to 18.4-150600.13.11.1
postgresql18-contrib - update to 18.4-150600.13.11.1
postgresql18-test - update to 18.4-150600.13.11.1
postgresql18-plperl-debuginfo - update to 18.4-150600.13.11.1
postgresql18-server-debuginfo - update to 18.4-150600.13.11.1

• https://www.postgresql.org/about/news/postgresql-184-1710-1614-1518-and-1423-released-3297/
• https://www.postgresql.org/support/security/CVE-2026-6638/

• Multiple vulnerabilities in PostgreSQL
• Debian update for postgresql-17
• SUSE update for postgresql17
• SUSE update for postgresql18
• SUSE update for postgresql18
• SUSE update for postgresql18
• SUSE update for postgresql16
• SUSE update for postgresql16
• Ubuntu update for postgresql-14
• openEuler 24.03 LTS SP3 update for postgresql-17
• SUSE update for postgresql16
• SUSE update for postgresql17
• Multiple vulnerabilities in Tenable Security Center
• Tenable Security Center on Enclave Security update for third-party components
• Gentoo update for PostgreSQL