CVE-2026-14668

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

State: Published
Severity: 8.1 High
Published: Aug 13, 2026
Updated: Aug 29, 2026
Reserved: Jul 3, 2026

Description

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 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

Scores

CVSS	Score	Vector	Source
3.1	8.1 High	CVSS:3.1/AV:N/AC:L/PR:L/UI:N/S:U/C:H/I:N/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-2026-14668/

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