CVE-2026-6479

HIGH severity · CVSS 7.5 · CWE-674

7.5CVSS HIGH

Summary

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.

Impact & exploitability

Attack vectorNetwork

Attack complexityLow

Privileges requiredNone

User interactionNone

Confidentiality impactNone

Integrity impactNone

Availability impactHigh

Exploit probability (EPSS)0%

CVSS:3.1/AV:N/AC:L/PR:N/UI:N/S:U/C:N/I:N/A:H

Affected products we track (1)

PostgreSQL

Recommendation

Apply the vendor fix promptly. Open any affected product above for its exact safe version.

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

Additional information

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