QwikSec

Security Database

CVE

CWE

Training

CVE Database
/

CVE-2026-6475

Back to search

CVE-2026-6475

Published: May 14, 2026

Modified: May 15, 2026

PUBLISHED

CVSS v3.1

8.8

HIGH

Description

Symlink following in PostgreSQL pg_basebackup plain format and in pg_rewind allows an origin superuser to overwrite local files, e.g. /var/lib/postgres/.bashrc, that hijack the operating system account. It will remain the case that starting the server after these commands implicitly trusts the origin superuser, due to features like shared_preload_libraries. Hence, the attack has practical implications only if one takes relevant action between these commands and server start, like moving the files to a different VM or snapshotting the VM. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.

VendorProductVersions

n/a

PostgreSQL

affected
18 - < 18.4
affected
17 - < 17.10
affected
16 - < 16.14
affected
15 - < 15.18
affected
0 - < 14.23

Weaknesses (CWE)

CWE-61

CVSS v3.1 Details

CVSS v3.1 Vector

CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Attack Vector

Network

Attack Complexity

Low

Privileges Required

None

User Interaction

Required

Scope

Unchanged

Confidentiality

High

Integrity

High

Availability

High

References

Security Training

Train your team to recognize and prevent security threats with our comprehensive security awareness program.

Start Training

Vulnerability Scanning

Discover vulnerabilities in your applications and infrastructure before attackers do.

Scan Now