Bug 2572532 (CVE-2026-18447)

Summary: CVE-2026-18447 postgresql: postgresql: Arbitrary code execution via type confusion in SQL-language functions
Product: [Other] Security Response Reporter: OSIDB Bzimport <bzimport>
Component: vulnerabilityAssignee: Product Security DevOps Team <prodsec-dev>
Status: NEW --- QA Contact:
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Priority: high    
Version: unspecifiedKeywords: Security
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OS: Linux   
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A flaw was found in PostgreSQL. An authenticated database user with privileges to create database objects can trigger a type confusion flaw by defining a SQL-language function with an output parameter of type "any". This vulnerability allows the user to execute arbitrary code with the permissions of the operating system user running the database service.
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Description OSIDB Bzimport 2026-11-12 14:31:38 UTC
Type confusion in PostgreSQL SQL-language functions allows an object creator to execute arbitrary code as the operating system user running the database, via an output parameter of type "any".  Versions before PostgreSQL 18.7, 17.12, 16.16, 15.20, and 14.25 are affected.