8.8

CVE-2026-6475

Medienbericht

PostgreSQL pg_basebackup and pg_rewind can overwrite unrelated files of origin superuser choice

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.
Daten sind bereitgestellt durch National Vulnerability Database (NVD)
Postgresql ≫ Postgresql Version < 14.23
Postgresql ≫ Postgresql Version >= 15.0 < 15.18
Postgresql ≫ Postgresql Version >= 16.0 < 16.14
Postgresql ≫ Postgresql Version >= 17.0 < 17.10
Postgresql ≫ Postgresql Version >= 18.0 < 18.4
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Zu dieser CVE wurde keine Warnung gefunden.
EPSS Metriken
Typ Quelle Score Percentile
EPSS FIRST.org 0.32% 0.239
CVSS Metriken
Quelle Base Score Exploit Score Impact Score Vector String
f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 8.8 2.8 5.9
CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H
CWE-61 UNIX Symbolic Link (Symlink) Following

The product, when opening a file or directory, does not sufficiently account for when the file is a symbolic link that resolves to a target outside of the intended control sphere. This could allow an attacker to cause the product to operate on unauthorized files.

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VulnDex Intel
Media Report
18.05.2026 14:45
https://www.postgresql.org/support/security/CVE-2026-6475/
Patch
Vendor Advisory