Detections
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Echo: postgresql-15: security update to 15.18postgresql-17: security update to 17.10

high Tenable Cloud Security Plugin ID 458336

Description

There are packages installed that are affected by a vulnerability referenced in the following CVE:

 - 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.
 (CVE-2026-6475)

Solution

Update the postgresql-15 library and its related packages to version 15.18 or later.

See Also

https://advisory.echohq.com/cve/CVE-2026-6475

Plugin Details

Severity: High

ID: 458336

Version: Revision 1.1

Type: Local

Published: 10/2/2026

Updated: 10/2/2026

Risk Information

VPR

Risk Factor: Medium

Score: 4.9

Percentile: 58.18

CVSS v2

Risk Factor: Critical

Base Score: 10

Temporal Score: 7.4

Vector: CVSS2#AV:N/AC:L/Au:N/C:C/I:C/A:C

CVSS Score Source: CVE-2026-6475

CVSS v3

Risk Factor: High

Base Score: 8.8

Temporal Score: 7.7

Vector: CVSS:3.0/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H

Temporal Vector: CVSS:3.0/E:U/RL:O/RC:C

Vulnerability Information

Exploit Ease: No known exploits are available

Patch Publication Date: 5/14/2026

Vulnerability Publication Date: 5/14/2026

Reference Information

CVE: CVE-2026-6475