CVE-2026-6479
Uncontrolled recursion in PostgreSQL SSL and GSS negotiation allows an attacker able to connect to a PostgreSQL AF_UNIX socket to achieve sustained denial of service. If SSL and GSS are both disabled, an attacker can do the same via access to a PostgreSQL TCP socket. Versions before PostgreSQL 18.4, 17.10, 16.14, 15.18, and 14.23 are affected.
Version Information
| Affected branch | Introduced | Fixed In | Fix Published |
|---|---|---|---|
| 14 | — | 14.23 | 2026-05-14 |
| 15 | — | 15.18 | 2026-05-14 |
| 16 | — | 16.14 | 2026-05-14 |
| 17 | — | 17.10 | 2026-05-14 |
| 18 | — | 18.4 | 2026-05-14 |
CVSS 3.0
| Overall Score | 7.5 |
|---|---|
| Component | core server |
| Vector | AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H |
First published: 2026-05-14
Historical source observations
These dated records preserve the original source claims separately from the reviewed fix list.
center · 2026-10-03 12:08:35.169032+08
- PostgreSQL 18 · Original minor coordinate: 4
- PostgreSQL 17 · Original minor coordinate: 10
- PostgreSQL 16 · Original minor coordinate: 14
- PostgreSQL 15 · Original minor coordinate: 18
- PostgreSQL 14 · Original minor coordinate: 23
pgweb · 2026-10-03 12:08:55.967155+08
- PostgreSQL 18 · Original minor coordinate: 4
- PostgreSQL 17 · Original minor coordinate: 10
- PostgreSQL 16 · Original minor coordinate: 14
- PostgreSQL 15 · Original minor coordinate: 18
- PostgreSQL 14 · Original minor coordinate: 23