CVE-2026-6479
PostgreSQL SSL/GSS init causes denial of service, via uncontrolled recursion
CVSS Score
7.5
EPSS Score
0.0%
EPSS Percentile
0th
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.
| CWE | CWE-674 |
| Vendor | n/a |
| Product | postgresql |
| Ecosystems | |
| Industries | Technology |
| Published | May 14, 2026 |
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CVSS v3 Breakdown
CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H Attack Vector
Attack Complexity
Privileges Required
User Interaction
Scope
Confidentiality
Integrity
Availability
Affected Versions
n/a / PostgreSQL
18 < 18.4 17 < 17.10 16 < 16.14 15 < 15.18 0 < 14.23
References
Credits
The PostgreSQL project thanks Calif.io in collaboration with Claude and Anthropic Research for reporting this problem.