Observable discrepancy in PostgreSQL - CVE-2026-14672

Vulnerability identifier: #VU142634

CSH Severity: Medium

CVSS v4: 6.9 [CVSS:4.0/AV:N/AC:L/AT:N/PR:N/UI:N/VC:L/VI:N/VA:N/SC:N/SI:N/SA:N]

CVE-ID: CVE-2026-14672

CWE-ID: CWE-203

Exploitation vector: Remote access

Exploit availability: No public exploit available

The vulnerability allows a remote attacker to disclose sensitive information.

The vulnerability exists due to improper information exposure in the SCRAM authentication mechanism when handling authentication requests. A remote attacker can observe the SCRAM iteration count in the authentication challenge to disclose sensitive information.

The issue can be used to test whether a user exists only if the probed user has a non-default scram_iterations count.

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

Install security update from vendor's website.

PostgreSQL - addressed in versions 16.15, 17.11, 18.5
postgresql-14 (Ubuntu package) - addressed in versions 14.24-0ubuntu0.22.04.1, 16.15-0ubuntu0.24.04.1, 18.6-0ubuntu0.26.04.1
postgresql16-pltcl-debuginfo - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-contrib-debuginfo - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-devel-debuginfo - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-debugsource - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-contrib - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-server - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-pltcl - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-server-devel-debuginfo - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16 - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-server-debuginfo - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-server-devel - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-plpython - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-plpython-debuginfo - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-debuginfo - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-devel - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-plperl - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-plperl-debuginfo - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-docs - addressed in versions 16.15-3.47.1, 16.15-150200.5.49.1, 16.15-150600.16.38.1
postgresql16-llvmjit-devel - update to 16.15-150600.16.38.1
postgresql16-test - update to 16.15-150600.16.38.1
postgresql16-llvmjit - update to 16.15-150600.16.38.1
postgresql16-llvmjit-debuginfo - update to 16.15-150600.16.38.1
postgresql-17 (Debian package) - update to 17.11-0+deb13u1
postgresql-17 - update to 17.11-1
postgresql-17-upgrade-devel - update to 17.11-1
postgresql-17-plpython3 - update to 17.11-1
postgresql-17-plperl - update to 17.11-1
postgresql-17-docs - update to 17.11-1
postgresql-17-debugsource - update to 17.11-1
postgresql-17-debuginfo - update to 17.11-1
postgresql-17-contrib - update to 17.11-1
postgresql-17-test-rpm-macros - update to 17.11-1
postgresql-17-pltcl - update to 17.11-1
postgresql-17-upgrade - update to 17.11-1
postgresql-17-test - update to 17.11-1
postgresql-17-static - update to 17.11-1
postgresql-17-server-devel - update to 17.11-1
postgresql-17-server - update to 17.11-1
postgresql-17-private-libs - update to 17.11-1
postgresql-17-private-devel - update to 17.11-1
postgresql17-plpython - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-llvmjit-devel - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-server-devel-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-pltcl - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-debugsource - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-pltcl-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-plperl-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-plpython-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-server-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-server-devel - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-plperl - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-devel - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-server - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-contrib - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17 - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-contrib-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-devel-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-docs - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-llvmjit - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-llvmjit-debuginfo - update to 17.11-150600.13.32.1
postgresql17-test - update to 17.11-150600.13.32.1
libpq5-32bit - addressed in versions 18.6-8.17.1, 18.6-150200.5.17.1, 18.6-150600.13.16.1
libpq5-debuginfo-32bit - update to 18.6-8.17.1
libecpg6-debuginfo - addressed in versions 18.6-8.17.1, 18.6-150200.5.17.1, 18.6-150600.13.16.1
libpq5-debuginfo - addressed in versions 18.6-8.17.1, 18.6-150200.5.17.1, 18.6-150600.13.16.1
libecpg6 - addressed in versions 18.6-8.17.1, 18.6-150200.5.17.1, 18.6-150600.13.16.1
libpq5 - addressed in versions 18.6-8.17.1, 18.6-150200.5.17.1, 18.6-150600.13.16.1
libecpg6-debuginfo-32bit - update to 18.6-8.17.1
libecpg6-32bit - addressed in versions 18.6-8.17.1, 18.6-150600.13.16.1
libpq5-32bit-debuginfo - addressed in versions 18.6-150200.5.17.1, 18.6-150600.13.16.1
postgresql18-debuginfo - addressed in versions 18.6-150200.5.17.1, 18.6-150600.13.16.1
postgresql18-debugsource - addressed in versions 18.6-150200.5.17.1, 18.6-150600.13.16.1
postgresql18-plpython-debuginfo - update to 18.6-150600.13.16.1
postgresql18-devel-mini - update to 18.6-150600.13.16.1
postgresql18-contrib - update to 18.6-150600.13.16.1
postgresql18-devel-mini-debuginfo - update to 18.6-150600.13.16.1
postgresql18-devel-debuginfo - update to 18.6-150600.13.16.1
postgresql18-pltcl-debuginfo - update to 18.6-150600.13.16.1
postgresql18-llvmjit - update to 18.6-150600.13.16.1
postgresql18-devel - update to 18.6-150600.13.16.1
postgresql18 - update to 18.6-150600.13.16.1
postgresql18-server-devel-debuginfo - update to 18.6-150600.13.16.1
postgresql18-contrib-debuginfo - update to 18.6-150600.13.16.1
postgresql18-plperl - update to 18.6-150600.13.16.1
libecpg6-64bit-debuginfo - update to 18.6-150600.13.16.1
libpq5-64bit-debuginfo - update to 18.6-150600.13.16.1
libecpg6-64bit - update to 18.6-150600.13.16.1
libpq5-64bit - update to 18.6-150600.13.16.1
postgresql18-docs - update to 18.6-150600.13.16.1
postgresql18-llvmjit-devel - update to 18.6-150600.13.16.1
postgresql18-server - update to 18.6-150600.13.16.1
postgresql18-server-debuginfo - update to 18.6-150600.13.16.1
postgresql18-plpython - update to 18.6-150600.13.16.1
postgresql18-mini-debugsource - update to 18.6-150600.13.16.1
postgresql18-server-devel - update to 18.6-150600.13.16.1
postgresql18-plperl-debuginfo - update to 18.6-150600.13.16.1
postgresql18-test - update to 18.6-150600.13.16.1
libecpg6-32bit-debuginfo - update to 18.6-150600.13.16.1
postgresql18-pltcl - update to 18.6-150600.13.16.1
postgresql18-llvmjit-debuginfo - update to 18.6-150600.13.16.1

• https://www.postgresql.org/support/security/CVE-2026-14672/

• Multiple vulnerabilities in PostgreSQL
• Debian update for postgresql-17
• openEuler 24.03 LTS SP3 update for postgresql-17
• openEuler 24.03 LTS SP4 update for postgresql-17
• Ubuntu update for postgresql-14
• SUSE update for postgresql16
• SUSE update for postgresql18
• SUSE update for postgresql16
• SUSE update for postgresql16
• SUSE update for postgresql18
• SUSE update for postgresql18
• SUSE update for postgresql17
• SUSE update for postgresql17