Type Confusion in PostgreSQL - CVE-2026-14668
Published: August 15, 2026
Vulnerability identifier: #VU142638
CSH Severity: Medium
CVSS v4: 7.2 [CVSS:4.0/AV:N/AC:L/AT:N/PR:L/UI:N/VC:H/VI:N/VA:H/SC:N/SI:N/SA:N]
CVE-ID: CVE-2026-14668
CWE-ID: CWE-843
Exploitation vector: Remote access
Exploit availability:
No public exploit available
Vulnerability details
The vulnerability allows a remote user to disclose sensitive information and cause a denial of service.
The vulnerability exists due to type confusion in the ctid data type selectivity estimator when processing a chosen non-ctid input. A remote user can create an object with crafted input to disclose sensitive information and cause a denial of service.
The disclosed value is a calculation derived from an arbitrary 4-byte span of memory, and substantial memory value recovery appears possible despite loss of precision.
Affected software
PostgreSQL
Debian Linux
postgresql-17 (Debian package)
Debian Linux
postgresql-17 (Debian package)
How to mitigate CVE-2026-14668
Install security update from vendor's website.
PostgreSQL - addressed in versions 14.24, 15.19, 16.15, 17.11, 18.5
postgresql-17 (Debian package) - update to 17.11-0+deb13u1
postgresql-17 (Debian package) - update to 17.11-0+deb13u1