CVE-2026-14668 PUBLISHED

PostgreSQL ctid type confusion in selectivity estimator discloses derivative of arbitrary read

Assigner: PostgreSQL
Reserved: 03.07.2026 Published: 13.08.2026 Updated: 13.08.2026

Type confusion regarding input of PostgreSQL ctid data type selectivity estimator allows an object creator to view a calculation derived from the value of an arbitrary 4-byte span of memory, via a chosen non-ctid input. While the calculation loses precision, substantial memory value recovery appears possible. Versions before PostgreSQL 18.5, 17.11, 16.15, 15.19, and 14.24 are affected.

Metrics

CVSS 3.1

CVSS Vector: CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/A:H
CVSS Score: 8.1

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

CVSS 3.1

Product Status

Vendor	n/a
Product	PostgreSQL
Versions	Default: unaffected affected from 18 to 18.5 (excl.) affected from 17 to 17.11 (excl.) affected from 16 to 16.15 (excl.) affected from 15 to 15.19 (excl.) affected from 0 to 14.24 (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 Hcamael for reporting this problem.

References

https://www.postgresql.org/support/security/CVE-2026-14668/

Problem Types

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