CVE-2026-120142 PUBLISHED

PostgreSQL dropped-column type confusion executes arbitrary code

Assigner: PostgreSQL
Reserved: 30.10.2026 Published: 12.11.2026 Updated: 12.11.2026

Type confusion in PostgreSQL anonymous RECORD types allows an object creator to execute arbitrary code as the operating system user running the database, via row types having dropped attributes in the same positions but with different widths or alignments. Within major versions 17-18, minor versions before PostgreSQL 18.7 and 17.12 are affected. Versions before PostgreSQL 17 are unaffected.

Metrics

CVSS 3.1

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

Attack Vector	Network	Scope	Unchanged
Attack Complexity	Low	Confidentiality Impact	High
Privileges Required	Low	Integrity Impact	High
User Interaction	None	Availability Impact	High

CVSS 3.1

Product Status

Vendor	n/a
Product	PostgreSQL
Versions	Default: unaffected affected from 18 to 18.7 (excl.) affected from 17 to 17.12 (excl.)

Affected Configurations

attacker has permission to create objects (temporary objects or non-temporary objects in at least one schema)

Credits

The PostgreSQL project thanks Peter Geoghegan for reporting this problem.

References

https://www.postgresql.org/support/security/CVE-2026-120142/

Problem Types

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