CVE-2026-6638
Low
Description
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 next REFRESH PUBLICATION. Within major versions 16, 17, and 18, minor versions before PostgreSQL 18.4, 17.10, and 16.14 are affected. Versions before PostgreSQL 16 are unaffected.
SeverityLow
CVSS3.7
Exploit probability—
Product
Postgresql
PublishedMay 14, 2026
First seenMay 14, 2026
Weakness typeCWE-89SQL injection
How to fix
Update
- postgresql postgresql16.14, 17.10, 18.4 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| postgresql postgresql | 16.0 ≤ v < 16.14, 17.0 ≤ v < 17.10, 18.0 ≤ v < 18.4 | 16.14, 17.10, 18.4 |
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