CVE-2026-39828

high

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.

References

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://go.dev/issue/79562

https://go.dev/cl/781621

https://bugzilla.redhat.com/show_bug.cgi?id=2480687

https://access.redhat.com/security/cve/CVE-2026-39828

https://access.redhat.com/errata/RHSA-2026:26547

https://access.redhat.com/errata/RHSA-2026:26546

Details

Source: Mitre, NVD

Published: 2026-05-22

Updated: 2026-07-02

Risk Information

CVSS v2

Base Score: 8.5

Vector: CVSS2#AV:N/AC:L/Au:S/C:C/I:C/A:N

Severity: High

CVSS v3

Base Score: 8.8

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

Severity: High

EPSS

EPSS: 0.0003