CVE-2026-16239 — PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code

CVE-2026-16239

PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code PUBLISHED

Description (CNA)

Type confusion in PostgreSQL "portal"/cursor lifecycle allows a user to execute arbitrary code as the operating system user running the database, via re-creation of a cursor or other portal with different types. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

Affected (CNA)

Vendor / product	Versions
n/a / PostgreSQL	affected 18 before 18.6; affected 17 before 17.11; affected 16 before 16.15; affected 15 before 15.19; affected 0 before 14.24

CWE

CWE-843

References

https://www.postgresql.org/support/security/CVE-2026-16239/

ADP enrichment

CISA-ADP

No English description supplied.

No references supplied.