Missing validation of multibyte character length in PostgreSQL text manipulation allows a database user to issue crafted queries that achieve a buffer overrun. That suffices to execute arbitrary code as the operating system user running the database. Versions before PostgreSQL 18.2, 17.8, 16.12, 15.16, and 14.21 are affected.


Fixing CVE-2026-2006 for the postgresql package in Amazon Linux 2 would require significant changes which may break existing customer workflows. Considering the tradeoff between the stability of Amazon Linux and the impact of CVE-2026-2006, a fix will not be provided for postgresql in Amazon Linux 2 core at this time. Please consider migrating to postgresql14 in AL2 Extras which is still supported, or to AL2023 which provides multiple supported versions of postgresql.