CVE-2026-39828

MEDIUM

Invoking bypass of certificate restrictions in golang.org/x/crypto/ssh

Title source: cna

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 (4)

Core 4

Core References

https://go.dev/issue/79562

https://groups.google.com/g/golang-announce/c/a082jnz-LvI

https://go.dev/cl/781621

https://pkg.go.dev/vuln/GO-2026-5014

Scores

CVSS v3 6.3

EPSS 0.0017

EPSS Percentile 6.9%

Attack Vector NETWORK

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

CISA SSVC

Vulnrichment

Exploitation none

Automatable no

Technical Impact partial

Details

CWE

CWE-295

Status published

Products (2)

golang/crypto < 0.52.0

golang.org/x/crypto/golang.org/x/crypto/ssh < 0.52.0

Published May 22, 2026

Tracked Since May 22, 2026