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, 16.15, 15.19, and 14.24 are affected.
| Affected Version | Fixed In | Fix Published |
|---|---|---|
| 18 | 18.5 | 2026-08-13 |
| 17 | 17.11 | 2026-08-13 |
| 16 | 16.15 | 2026-08-13 |
| 15 | 15.19 | 2026-08-13 |
| 14 | 14.24 | 2026-08-13 |
For more information about PostgreSQL versioning, please visit the versioning page.
| Overall Score | 4.3 |
|---|---|
| Component | core server |
| Vector | AV:N/AC:L/PR:L/UI:N/S:U/C:L/I:N/A:N |
If you wish to report a new security vulnerability in PostgreSQL, please send an email to security@postgresql.org.
For reporting non-security bugs, please see the Report a Bug page.