PostgreSQL Integer Overflow or Wraparound Vulnerability - CVE-2026-14662

Integer wraparound in PostgreSQL tsvector and tsquery data type functions allows an unprivileged database user to cause the server to undersize an allocation and write out-of-bounds via crafted large inputs. This may execute arbitrary code as the operating system user running the database. These types are typically sourced from application logic not taken from the application39s user. Hence application users attacking the database through the application as a conduit are unlikely. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.5 17.11 16.15 15.19 and 14.24 are affected.