What is CVE-2026-6638?

CVE-2026-6638 is a low-severity vulnerability in Postgresql, classified under SQL Injection. CVSS score: 3.7/10. Published 2026-05-14.

How severe is CVE-2026-6638?

Low severity. CVSS v3 base score is 3.7 out of 10.

SQL Injection in Postgresql

CVE-2026-6638

SQL injection in PostgreSQL logical replication ALTER SUBSCRIPTION ... REFRESH PUBLICATION allows a subscriber table creator to execute arbitrary SQL with the subscription's publication-side credentials. The attack takes effect at the nex…

Vulnerability class: SQL Injection

EPSS: 0.000 (7.2th percentile) — read the EPSS interpretation.

CVSS v3 metric

CVSS v3 base score 3.7 (Low). Vector: CVSS:3.1/AV:N/AC:H/PR:L/UI:R/S:U/C:L/I:L/A:N.

Affected products

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

Weakness classification (CWE)

CWE-89 — SQL Injection

References

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

Frequently asked questions

What is CVE-2026-6638?: CVE-2026-6638 is a low-severity vulnerability in Postgresql, classified under SQL Injection. CVSS score: 3.7/10. Published 2026-05-14.
How severe is CVE-2026-6638?: Low severity. CVSS v3 base score is 3.7 out of 10.