CVE-2026-18024 PostgreSQL ascii() function reads past end of buffer

Buffer over-read in PostgreSQL ascii SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value. This is the same class of defect that CVE-2026-2006 fixed, though this instance has less impact. Versions before PostgreSQL 18.5, 17.11, 16.1...

CVE-2026-18024

CVE-2026-18024 affects the PostgreSQL ascii() function, where a buffer over-read discloses up to 3 bytes after the end of a specific allocation through a crafted text value. The issue belongs to the same class as CVE-2026-2006, but with lesser impact. Affected versions include all releases prior ...

Vulnerability in core server (CVE-2026-18024)

PostgreSQL ascii function reads past end of buffer Buffer over-read in PostgreSQL ascii SQL function allows a user to disclose up to 3 bytes after the end of a specific allocation, via a crafted text value. This is the same class of defect that CVE-2026-2006 fixed, though this instance has less...