PostgreSQL Type Confusion Enables Memory Value Recovery

CVE-2026-14668 is a type confusion vulnerability in PostgreSQL's ctid data type selectivity estimator that allows an authenticated object creator to leak arbitrary memory values. By submitting non-ctid inputs to the estimator function, attackers can trigger calculations on unintended memory regions and recover substantial portions of sensitive data through statistical analysis of the returned values. This affects PostgreSQL versions before 18.5, 17.11, 16.15, 15.19, and 14.24—impacting organizations running unpatched database instances. The vulnerability is particularly dangerous in multi-tenant environments or where untrusted users have schema creation privileges, as it provides a direct path to information disclosure without requiring elevated permissions.

While this CVE does not map to specific MITRE ATT&CK techniques, Casky's Claude AI engine with extended reasoning can identify the attack surface by correlating type confusion patterns (CWE-843) with database query behavior anomalies. Practitioners using Casky would detect suspicious activity through patterns indicating: (1) repeated queries to system estimator functions with malformed input types, (2) unusual result set distributions from selectivity calculations that deviate from normal query planning, and (3) database object creation followed immediately by estimator function calls—a behavioral sequence inconsistent with legitimate workloads. The platform's 754 security skills would flag CWE-843 exploitation attempts by monitoring function parameter validation failures and memory access patterns, enabling teams to identify reconnaissance activity before actual data exfiltration occurs.