Type Confusion in PostgreSQL - CVE-2026-16239

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Main Vulnerability Database Vulnerabilities #VU142623

Type Confusion in PostgreSQL - CVE-2026-16239

Published: August 15, 2026


Vulnerability identifier: #VU142623
CSH Severity: Medium
CVSS v4: 8.7 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:H/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-16239
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability: No public exploit available

Vulnerability details

The vulnerability allows a remote user to execute arbitrary code.

The vulnerability exists due to type confusion in the portal/cursor lifecycle when re-creating a cursor or other portal with different types. A remote user can re-create a cursor or other portal with different types to execute arbitrary code.

Successful exploitation results in code execution as the operating system user running the database.


Affected software

PostgreSQL
SUSE Linux Enterprise Server 15 SP4
SUSE Linux Enterprise Server 12 SP5
SUSE Linux Enterprise Server 12 SP5 LTSS Extended
SUSE Linux Enterprise Server 15 SP6
SUSE Linux Enterprise Server 15 SP5
Debian Linux
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 High Performance Computing 12
SUSE Linux Enterprise Server 12
SUSE Linux Enterprise Server for SAP Applications 12
SUSE Linux Enterprise Real Time 15
SUSE Linux Enterprise Desktop 15
Red Hat Enterprise Linux for IBM z Systems
Red Hat Enterprise Linux for x86_64
Red Hat Enterprise Linux for Power, little endian
Red Hat Enterprise Linux for ARM 64
Red Hat Enterprise Linux Server - AUS
Red Hat Enterprise Linux Server - TUS
Red Hat Enterprise Linux for x86_64 - Extended Update Support
Red Hat Enterprise Linux for IBM z Systems - Extended Update Support
Red Hat Enterprise Linux for Power, little endian - Extended Update Support
Red Hat Enterprise Linux for ARM 64 - Extended Update Support
Server Applications Module
Legacy Module
Basesystem Module
SUSE Package Hub 15
openSUSE Leap
Ubuntu
openEuler
Red Hat Enterprise Linux Server for Power LE - Update Services for SAP Solutions
postgresql (Red Hat package)
postgresql-14 (Ubuntu package)
postgresql14-debuginfo
postgresql14-devel-debuginfo
postgresql14-debugsource
postgresql14-plpython-debuginfo
postgresql14-plpython
postgresql14-server
postgresql14-devel
postgresql14-contrib
postgresql14-pltcl-debuginfo
postgresql14-server-devel
postgresql14-plperl
postgresql14-server-debuginfo
postgresql14
postgresql14-contrib-debuginfo
postgresql14-plperl-debuginfo
postgresql14-pltcl
postgresql14-docs
postgresql14-server-devel-debuginfo
postgresql14-llvmjit
postgresql14-llvmjit-devel
postgresql14-llvmjit-debuginfo
postgresql14-test
postgresql-plperl
postgresql-plpython3
postgresql-private-devel
postgresql-private-libs
postgresql-server
postgresql-server-devel
postgresql-static
postgresql-test
postgresql-test-rpm-macros
postgresql-pltcl
postgresql-debuginfo
postgresql-contrib
postgresql
postgresql-llvmjit
postgresql-docs
postgresql-debugsource
postgresql15-devel
postgresql15-contrib
postgresql15-pltcl
postgresql15-server-debuginfo
postgresql15-server
postgresql15-plpython-debuginfo
postgresql15-plperl-debuginfo
postgresql15-server-devel-debuginfo
postgresql15-server-devel
postgresql15-plperl
postgresql15-devel-debuginfo
postgresql15-contrib-debuginfo
postgresql15-plpython
postgresql15-pltcl-debuginfo
postgresql15-debugsource
postgresql15
postgresql15-debuginfo
postgresql15-docs
postgresql15-llvmjit
postgresql15-llvmjit-debuginfo
postgresql15-llvmjit-devel
postgresql15-test
postgresql16 (Red Hat package)
postgresql16-contrib-debuginfo
postgresql16-server-debuginfo
postgresql16-plperl-debuginfo
postgresql16-plperl
postgresql16-devel
postgresql16-debuginfo
postgresql16-pltcl-debuginfo
postgresql16-plpython-debuginfo
postgresql16-plpython
postgresql16-server-devel
postgresql16-docs
postgresql16
postgresql16-server-devel-debuginfo
postgresql16-pltcl
postgresql16-server
postgresql16-contrib
postgresql16-debugsource
postgresql16-devel-debuginfo
postgresql16-llvmjit
postgresql16-llvmjit-devel
postgresql16-test
postgresql16-llvmjit-debuginfo
postgresql-17 (Debian package)
postgresql-17
postgresql-17-test-rpm-macros
postgresql-17-contrib
postgresql-17-debuginfo
postgresql-17-debugsource
postgresql-17-docs
postgresql-17-plperl
postgresql-17-plpython3
postgresql-17-pltcl
postgresql-17-private-devel
postgresql-17-private-libs
postgresql-17-server
postgresql-17-server-devel
postgresql-17-static
postgresql-17-test
postgresql-17-upgrade
postgresql-17-upgrade-devel
postgresql17-server-devel
postgresql17-docs
postgresql17-llvmjit
postgresql17-llvmjit-devel
postgresql17-devel-debuginfo
postgresql17-contrib-debuginfo
postgresql17
postgresql17-contrib
postgresql17-devel
postgresql17-plperl
postgresql17-server
postgresql17-plpython
postgresql17-server-debuginfo
postgresql17-plpython-debuginfo
postgresql17-plperl-debuginfo
postgresql17-pltcl-debuginfo
postgresql17-debugsource
postgresql17-pltcl
postgresql17-server-devel-debuginfo
postgresql17-debuginfo
postgresql17-test
postgresql17-llvmjit-debuginfo
postgresql18 (Red Hat package)
libpq5-32bit
libpq5-debuginfo
libecpg6
libpq5
libecpg6-debuginfo-32bit
libecpg6-32bit
libpq5-debuginfo-32bit
libecpg6-debuginfo
postgresql18-debuginfo
postgresql18-debugsource
libpq5-32bit-debuginfo
postgresql18-server-devel-debuginfo
postgresql18-server
postgresql18
postgresql18-devel
postgresql18-llvmjit
postgresql18-pltcl-debuginfo
postgresql18-devel-debuginfo
postgresql18-devel-mini-debuginfo
postgresql18-plperl-debuginfo
libecpg6-32bit-debuginfo
libecpg6-64bit-debuginfo
libpq5-64bit-debuginfo
libecpg6-64bit
libpq5-64bit
postgresql18-docs
postgresql18-llvmjit-devel
postgresql18-plperl
postgresql18-plpython
postgresql18-mini-debugsource
postgresql18-server-devel
postgresql18-contrib
postgresql18-test
postgresql18-contrib-debuginfo
postgresql18-pltcl
postgresql18-llvmjit-debuginfo
postgresql18-server-debuginfo
postgresql18-plpython-debuginfo
postgresql18-devel-mini

How to mitigate CVE-2026-16239

Install security update from vendor's website.

PostgreSQL - addressed in versions 14.24, 15.19, 16.15, 17.11, 18.5
postgresql (Red Hat package) - update to 13.23-1.el9_2.5
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
postgresql14-debuginfo - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-devel-debuginfo - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-debugsource - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-plpython-debuginfo - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-plpython - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-server - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-devel - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-contrib - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-pltcl-debuginfo - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-server-devel - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-plperl - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-server-debuginfo - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14 - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-contrib-debuginfo - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-plperl-debuginfo - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-pltcl - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-docs - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-server-devel-debuginfo - addressed in versions 14.24-3.75.1, 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-llvmjit - addressed in versions 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-llvmjit-devel - addressed in versions 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-llvmjit-debuginfo - addressed in versions 14.24-150200.5.77.1, 14.24-150600.16.36.1
postgresql14-test - update to 14.24-150600.16.36.1
postgresql-plperl - update to 15.19-1
postgresql-plpython3 - update to 15.19-1
postgresql-private-devel - update to 15.19-1
postgresql-private-libs - update to 15.19-1
postgresql-server - update to 15.19-1
postgresql-server-devel - update to 15.19-1
postgresql-static - update to 15.19-1
postgresql-test - update to 15.19-1
postgresql-test-rpm-macros - update to 15.19-1
postgresql-pltcl - update to 15.19-1
postgresql-debuginfo - update to 15.19-1
postgresql-contrib - update to 15.19-1
postgresql - update to 15.19-1
postgresql-llvmjit - update to 15.19-1
postgresql-docs - update to 15.19-1
postgresql-debugsource - update to 15.19-1
postgresql15-devel - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-contrib - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-pltcl - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-server-debuginfo - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-server - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-plpython-debuginfo - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-plperl-debuginfo - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-server-devel-debuginfo - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-server-devel - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-plperl - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-devel-debuginfo - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-contrib-debuginfo - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-plpython - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-pltcl-debuginfo - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-debugsource - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15 - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-debuginfo - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-docs - addressed in versions 15.19-3.61.1, 15.19-150200.5.62.1, 15.19-150600.16.36.1
postgresql15-llvmjit - update to 15.19-150600.16.36.1
postgresql15-llvmjit-debuginfo - update to 15.19-150600.16.36.1
postgresql15-llvmjit-devel - update to 15.19-150600.16.36.1
postgresql15-test - update to 15.19-150600.16.36.1
postgresql16 (Red Hat package) - update to 16.15-1.el10_2
postgresql16-contrib-debuginfo - 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-plperl-debuginfo - 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-devel - 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-pltcl-debuginfo - 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-plpython - 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-docs - 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-devel-debuginfo - 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 - 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-debugsource - 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-llvmjit - update to 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-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-test-rpm-macros - update to 17.11-1
postgresql-17-contrib - update to 17.11-1
postgresql-17-debuginfo - update to 17.11-1
postgresql-17-debugsource - update to 17.11-1
postgresql-17-docs - update to 17.11-1
postgresql-17-plperl - update to 17.11-1
postgresql-17-plpython3 - update to 17.11-1
postgresql-17-pltcl - update to 17.11-1
postgresql-17-private-devel - update to 17.11-1
postgresql-17-private-libs - update to 17.11-1
postgresql-17-server - update to 17.11-1
postgresql-17-server-devel - update to 17.11-1
postgresql-17-static - update to 17.11-1
postgresql-17-test - update to 17.11-1
postgresql-17-upgrade - update to 17.11-1
postgresql-17-upgrade-devel - update to 17.11-1
postgresql17-server-devel - 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-devel - 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-contrib-debuginfo - 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 - 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-plperl - 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-plpython - 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-plpython-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-pltcl-debuginfo - 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 - 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-debuginfo - addressed in versions 17.11-150200.5.33.1, 17.11-150600.13.32.1
postgresql17-test - update to 17.11-150600.13.32.1
postgresql17-llvmjit-debuginfo - update to 17.11-150600.13.32.1
postgresql18 (Red Hat package) - update to 18.6-1.el10_2
libpq5-32bit - 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-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
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
libpq5-32bit-debuginfo - addressed in versions 18.6-150200.5.17.1, 18.6-150600.13.16.1
postgresql18-server-devel-debuginfo - update to 18.6-150600.13.16.1
postgresql18-server - update to 18.6-150600.13.16.1
postgresql18 - update to 18.6-150600.13.16.1
postgresql18-devel - update to 18.6-150600.13.16.1
postgresql18-llvmjit - update to 18.6-150600.13.16.1
postgresql18-pltcl-debuginfo - update to 18.6-150600.13.16.1
postgresql18-devel-debuginfo - update to 18.6-150600.13.16.1
postgresql18-devel-mini-debuginfo - update to 18.6-150600.13.16.1
postgresql18-plperl-debuginfo - update to 18.6-150600.13.16.1
libecpg6-32bit-debuginfo - 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-plperl - 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-contrib - update to 18.6-150600.13.16.1
postgresql18-test - update to 18.6-150600.13.16.1
postgresql18-contrib-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
postgresql18-server-debuginfo - update to 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

External References

Related Security Bulletins