CVE-2026-18408
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.
How to fix
- postgresql postgresql14.24, 15.19, 16.15, 17.11, 18.5 or later
Affected products
| Product | Affected versions | Fixed in |
|---|---|---|
| postgresql postgresql | 14.0 ≤ v < 14.24, 15.0 ≤ v < 15.19, 16.0 ≤ v < 16.15, 17.0 ≤ v < 17.11, 18.0 ≤ v < 18.5 | 14.24, 15.19, 16.15, 17.11, 18.5 |
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