Bug 2515303 (CVE-2026-18408)

Summary:	CVE-2026-18408 postgresql: PostgreSQL: Arbitrary code execution via untrusted data inclusion in pg_dump
Product:	[Other] Security Response	Reporter:	OSIDB Bzimport <bzimport>
Component:	vulnerability	Assignee:	Product Security <prodsec-ir-bot>
Status:	NEW ---	QA Contact:
Severity:	high	Docs Contact:
Priority:	high
Version:	unspecified	CC:	dschmidt, jlanda, kshier, rhel-process-autobot, simaishi, stcannon, teagle, watson-tool-maintainers, yguenane
Target Milestone:	---	Keywords:	Security
Target Release:	---
Hardware:	All
OS:	Linux
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Doc Text:	A vulnerability in PostgreSQL allows a malicious origin-server superuser to achieve client-side arbitrary code execution during a database restore. By injecting untrusted data into a pg_dump export, the attacker can exploit the input expansion of the psql \restrict meta-command. When a victim processes this manipulated dump, the injected code executes with the privileges of the operating system account running the psql client.	Story Points:	---
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oVirt Team:	---	RHEL 7.3 requirements from Atomic Host:
Cloudforms Team:	---	Target Upstream Version:
Embargoed:
Bug Depends On:	2526279, 2526280
Bug Blocks:

Description OSIDB Bzimport 2026-08-13 13:27:18 UTC

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 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.