What is CVE-2026-6475?

CVE-2026-6475 is a high-severity vulnerability in Postgresql, classified under UNIX Symbolic Link (Symlink) Following. CVSS score: 8.8/10. Published 2026-05-14.

How severe is CVE-2026-6475?

High severity. CVSS v3 base score is 8.8 out of 10.

Vulnerability in Postgresql

CVE-2026-6475

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 starti…

EPSS: 0.000 (15.6th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 8.8 (High). Vector: CVSS:3.1/AV:N/AC:L/PR:N/UI:R/S:U/C:H/I:H/A:H.

Affected products

Postgresql
N/a Postgresql — versions 18, 17, 16

Weakness classification (CWE)

CWE-61 — UNIX Symbolic Link (Symlink) Following

References

f86ef6dc-4d3a-42ad-8f28-e6d5547a5007 (Patch, Vendor Advisory)

Frequently asked questions

What is CVE-2026-6475?: CVE-2026-6475 is a high-severity vulnerability in Postgresql, classified under UNIX Symbolic Link (Symlink) Following. CVSS score: 8.8/10. Published 2026-05-14.
How severe is CVE-2026-6475?: High severity. CVSS v3 base score is 8.8 out of 10.