Executive Summary

In PostgreSQL, incomplete tracking of role membership, attributes, and database ownership changes causes stale row‑level security (RLS) policies to persist in the query cache. A user can exploit plan reuse to read or modify data that should now be forbidden until the cache is invalidated or the session ends. Affected versions are PostgreSQL < 18.6, < 17.11, < 16.15, < 15.19, < 14.24. No current CISA KEV listing.

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Authoritative CVE Metadata - CVSS Base Score: 4.2 (MEDIUM) - Published: 2026-08-13T13:17:43.993 - Last Modified: 2026-08-29T23:17:12.400

Original Description: Incomplete tracking in PostgreSQL of changes to role membership, role attributes, and database ownership allows a query to continue using cached row-level security policies after those changes require a different policy, via plan reuse. Stale policies continue until some other event invalidates the cache or connection termination ends the session. This permits a user to complete reads and modifications that were recently permitted but now forbidden. An attacker must tailor an attack to a particular application's pattern of privilege removal and role-specific row security policies. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.

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