CVE-2026-6479

PostgreSQL SSL/GSS init causes denial of service, via uncontrolled recursion

State: Published
Severity: 7.5 High
Published: May 14, 2026
Updated: May 14, 2026
Reserved: Apr 17, 2026

Description

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.

Scores

CVSS	Score	Vector	Source
3.1	7.5 High	CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H	PostgreSQL

Weaknesses

CWE-674 Uncontrolled Recursion

Affected Products

Product	Versions
PostgreSQLn/a	18 to before 18.4Affected 17 to before 17.10Affected 16 to before 16.14Affected 15 to before 15.18Affected before 14.23Affected

References

https://www.postgresql.org/support/security/CVE-2026-6479/

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