Link Following Affecting postgresql17-test-debuginfo package, versions <0:17.10-1.amzn2023.0.1


Severity

Recommended
high

Based on Amazon Linux security rating.

Threat Intelligence

EPSS
0.32% (24th percentile)

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  • Snyk IDSNYK-AMZN2023-POSTGRESQL17TESTDEBUGINFO-17290307
  • published10 Jun 2026
  • disclosed14 May 2026

Introduced: 14 May 2026

CVE-2026-6475  (opens in a new tab)
CWE-59  (opens in a new tab)

How to fix?

Upgrade Amazon-Linux:2023 postgresql17-test-debuginfo to version 0:17.10-1.amzn2023.0.1 or higher.
This issue was patched in ALAS2023-2026-1766.

NVD Description

Note: Versions mentioned in the description apply only to the upstream postgresql17-test-debuginfo package and not the postgresql17-test-debuginfo package as distributed by Amazon-Linux. See How to fix? for Amazon-Linux:2023 relevant fixed versions and status.

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.

CVSS Base Scores

version 3.1