PT-2026-40920 · Postgresql Global Development Group+2 · Postgresql+2

Guancheng Li + 3 · Published 2026-05-14 · Updated 2026-05-21 · CVE-2026-6475

Positive Technologies (AI Summary)

CVSS v2.0

10

High

Base vector

AV:N/AC:L/Au:N/C:C/I:C/A:C

Name of the Vulnerable Software and Affected Versions PostgreSQL versions prior to 18.4 PostgreSQL versions prior to 17.10 PostgreSQL versions prior to 16.14 PostgreSQL versions prior to 15.18 PostgreSQL versions prior to 14.23

Description Symlink following in pg basebackup plain format and in pg rewind allows an origin superuser to overwrite local files, such as '/var/lib/postgres/.bashrc', which can lead to the hijacking of the operating system account. This issue has practical implications if actions are taken between the execution of these commands and the server start, such as moving files to a different virtual machine or snapshotting the virtual machine.

Recommendations Update to version 18.4 or later. Update to version 17.10 or later. Update to version 16.14 or later. Update to version 15.18 or later. Update to version 14.23 or later.

Fix

Link Following

Weakness Enumeration

CWE-61

CWE-59

Related Identifiers

BDU:2026-07100

BIT-POSTGRESQL-2026-6475

CVE-2026-6475

ECHO-848C-5472-D56D

OPENSUSE-SU-2026:10806-1

OPENSUSE-SU-2026:10807-1

OPENSUSE-SU-2026:10808-1

OPENSUSE-SU-2026:10809-1

OPENSUSE-SU-2026:10828-1

USN-8294-1

Affected Products

Linuxmint

Postgresql

Ubuntu

References · 50

• https://postgresql.org/support/security/CVE-2026-6475 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10806-1 · Vendor Advisory
• https://cve.org/CVERecord?id=CVE-2026-6475 · Security Note
• https://ubuntu.com/security/CVE-2026-6474 · Vendor Advisory
• https://osv.dev/vulnerability/ALPINE-CVE-2026-6475 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6472 · Vendor Advisory
• https://bdu.fstec.ru/vul/2026-07100 · Security Note
• https://osv.dev/vulnerability/USN-8294-1 · Vendor Advisory
• https://ubuntu.com/security/notices/USN-8294-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10808-1 · Vendor Advisory
• https://osv.dev/vulnerability/BIT-postgresql-2026-6475 · Vendor Advisory
• https://osv.dev/vulnerability/DEBIAN-CVE-2026-6475 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10809-1 · Vendor Advisory
• https://osv.dev/vulnerability/openSUSE-SU-2026:10807-1 · Vendor Advisory
• https://ubuntu.com/security/CVE-2026-6637 · Vendor Advisory