When an SSH server authentication callback returned PartialSuccessError with non-nil Permissions, those permissions were silently discarded, potentially dropping certificate restrictions such as force-command after a second factor succeeded. Returning non-nil Permissions with PartialSuccessError now results in a connection error.
https://security.access.redhat.com/data/csaf/v2/vex/2026/cve-2026-39828.json
https://pkg.go.dev/vuln/GO-2026-5014
https://groups.google.com/g/golang-announce/c/a082jnz-LvI
https://bugzilla.redhat.com/show_bug.cgi?id=2480687
https://access.redhat.com/security/cve/CVE-2026-39828