CVE-2026-39828

Description

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.

CVSS breakdown

Affected products

• Golang / crypto0.52.0
• golang.org/x/crypto / golang.org/x/crypto/ssh0 – 0.52.0

References

• MISChttps://go.dev/issue/79562
• MISChttps://groups.google.com/g/golang-announce/c/a082jnz-LvI
• MISChttps://go.dev/cl/781621
• MISChttps://pkg.go.dev/vuln/GO-2026-5014