8.8
High
CVE-2026-18408 Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject…
Description
Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject arbitrary code for restore-time execution as the client operating system account running psql to restore the dump, via psql \restrict meta-command input expansion. The fix for CVE-2025-8714 introduced \restrict and \unrestrict to block this attack, but \unrestrict itself was sufficient for an attack. pg_dumpall is also affected. pg_restore is affected when used to generate a plain-format dump. Non-core use of \restrict would be affected, but we've not identified non-core use. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
Affected products and versions
| Product | Affected versions | Fixed in |
|---|---|---|
| postgresql 18 | 18 → < 18.6 | 18.6 |
| postgresql 17 | 17 → < 17.11 | 17.11 |
| postgresql 16 | 16 → < 16.15 | 16.15 |
| postgresql 15 | 15 → < 15.19 | 15.19 |
| postgresql 14.24 | earliest → < 14.24 | 14.24 |
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