CVE-2026-39827

golang.org/x/crypto/ssh: Invoking memory leak when rejecting channels can lead to DoS

Description

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.

Patch Available

Fix available through Seal Security. No upgrade required, protect your application instantly.

Fix without upgrading

Score

6.5

Severity

Medium

Ecosystem

Publish Date

June 25, 2026

Modified Date

June 25, 2026

Score Vector

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

Affected Versions