This page tracks the Ubuntu fix status. The vulnerability itself is described on the main CVE page. View CVE-2026-18408 →
Categories
UBUNTU-CVE-2026-18408

Untrusted data inclusion in pg_dump in PostgreSQL allows a malicious superuser of the origin server to inject arbitrary code for restore-time executio...

Original description

The description as published by the source.

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.

Source: OSV.dev (Open Source Vulnerabilities) OSV

Affected packages

Ubuntu:Pro:14.04:LTS postgresql-9.3
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:16.04:LTS postgresql-9.5
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:Pro:18.04:LTS postgresql-10
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:20.04:LTS postgresql-12
[{"type":"ECOSYSTEM","events":[{"introduced":"0"}]}]
Ubuntu:22.04:LTS postgresql-14
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"14.24-0ubuntu0.22.04.1"}]}]
Ubuntu:24.04:LTS postgresql-16
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"16.15-0ubuntu0.24.04.1"}]}]
Ubuntu:26.04:LTS postgresql-18
[{"type":"ECOSYSTEM","events":[{"introduced":"0"},{"fixed":"18.6-0ubuntu0.26.04.1"}]}]

References

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