CVE-2026-16239

PostgreSQL type confusion in cursor CLOSE + DECLARE executes arbitrary code

State: Published
Severity: 8.8 High
Published: Aug 13, 2026
Updated: Aug 29, 2026
Reserved: Jul 20, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	8.8 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:H/A:H	PostgreSQL

Weaknesses

CWE-843 Access of Resource Using Incompatible Type ('Type Confusion')

Affected Products

Product	Versions
PostgreSQLn/a	18 to before 18.6Affected 17 to before 17.11Affected 16 to before 16.15Affected 15 to before 15.19Affected before 14.24Affected

References

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

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