CVE-2010-4478: OpenBSD OpenSSH

Critical severity, CVSS 9.8. EPSS: 4.2% chance of exploitation in the next 30 days.

OpenSSH 5.6 and earlier, when J-PAKE is enabled, does not properly validate the public parameters in the J-PAKE protocol, which allows remote attackers to bypass the need for knowledge of the shared secret, and successfully authenticate, by sending crafted values in each round of the protocol, a related issue to CVE-2010-4252.

Affected products

• OpenBSD OpenSSH: up to and including 5.6; version 1.2 only; version 1.2.1 only; version 1.2.2 only; version 1.2.3 only; version 1.2.27 only; …

Published 2010-12-06. Last modified 2026-06-16.