High · published August 13, 2026
Integer wraparound in PostgreSQL 32-bit builds of pltcl and plperl allows an object creator to cause the server to undersize an allocation and write out-of-bounds via crafted function bodies. This may execute arbitrary code as the operating system user running the database. CVE-2026-6473 had fixed similar problems. Versions before PostgreSQL 18.6, 17.11, 16.15, 15.19, and 14.24 are affected.
| Product | Versions | Fixed in |
|---|---|---|
| postgresql/postgresql | ≥ 14.0, < 14.24 | 14.24 |
| postgresql/postgresql | ≥ 15.0, < 15.19 | 15.19 |
| postgresql/postgresql | ≥ 16.0, < 16.15 | 16.15 |
| postgresql/postgresql | ≥ 17.0, < 17.11 | 17.11 |
| postgresql/postgresql | ≥ 18.0, < 18.5 | 18.5 |