CVE-2026-39827: Golang Crypto

Medium severity, CVSS 6.5. EPSS: 0.3% chance of exploitation in the next 30 days.

An authenticated SSH client that repeatedly opened channels which were rejected by the server caused unbounded memory growth, eventually crashing the server process and affecting all connected users. Rejected channels are now properly removed from the connection's internal state and released for garbage collection.

Affected products

• Golang Crypto: before 0.52.0 (fixed in 0.52.0)

Published 2026-05-22. Last modified 2026-07-23.